/* ============================================================
   AK赛事 · 共享样式表  /assets/site.css
   深夜转播车 × 战术分析室：堆叠面板、看台式三栏、粗野主义边线
   ============================================================ */

:root {
  --ink: #0B1613;
  --panel: #121C1B;
  --deck: #1E2A28;
  --signal: #00E5A8;
  --cyan: #35D6FF;
  --flare: #FF5A2E;
  --silver: #9FB0B8;
  --mist: #EAF4F0;
  --muted: #6C7E7A;
  --violet: #7B5CFF;
  --line: rgba(159, 176, 184, 0.22);
  --line-strong: rgba(159, 176, 184, 0.42);
  --edge: 2px;
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, 0.5);
  --shadow-signal: 4px 4px 0 rgba(0, 229, 168, 0.3);
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(159, 176, 184, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 176, 184, 0.045) 1px, transparent 1px),
    radial-gradient(circle at 18% 10%, rgba(0, 229, 168, 0.08), transparent 46%),
    radial-gradient(circle at 88% 82%, rgba(123, 92, 255, 0.07), transparent 44%),
    radial-gradient(rgba(234, 244, 240, 0.035) 1px, transparent 1px);
  background-size: 56px 56px, 56px 56px, 100% 100%, 100% 100%, 3px 3px;
  color: var(--mist);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--mist);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.4rem, 6vw, 4.8rem); line-height: 1.02; }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.08; }
h3 { font-size: clamp(1.2rem, 2.4vw, 1.6rem); line-height: 1.2; }
h4 { font-size: 1.05rem; line-height: 1.3; }

p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
li { margin: 0 0 0.4em; }

img, svg, video { max-width: 100%; display: block; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--signal); }

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

::selection { background: var(--signal); color: #04140E; }

#main-content, main { scroll-margin-top: 130px; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  transform: translateY(-120%);
  background: var(--signal);
  color: #04140E;
  font-weight: 700;
  font-size: 14px;
  padding: 12px 20px;
  border: var(--edge) solid var(--ink);
  box-shadow: var(--shadow-hard);
  transition: transform 180ms var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
  color: #04140E;
}

/* ---------- 通用容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.wrap--narrow { max-width: 820px; }

.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--split { grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); }

/* ---------- 堆叠面板 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: var(--edge) solid var(--line);
  padding: clamp(20px, 3vw, 36px);
}
.panel--deck { background: var(--deck); }
.panel--signal { border-color: var(--signal); box-shadow: var(--shadow-signal); }
.panel--flare { border-color: var(--flare); }

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 20px;
  border-bottom: var(--edge) solid var(--line);
  padding-bottom: 14px;
  margin-bottom: 20px;
}
.panel__head h2, .panel__head h3 { margin: 0; }

.eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal);
}

.stamp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.rule {
  height: var(--edge);
  border: 0;
  background: var(--line);
  margin: clamp(28px, 4vw, 48px) 0;
}
.rule--signal { background: var(--signal); }

.tilt { display: inline-block; transform: skewX(-4deg); }

/* ---------- 卡片与标记 ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--panel);
  border: var(--edge) solid var(--line);
  padding: clamp(18px, 2.4vw, 26px);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}
.card:hover, .card:focus-within {
  transform: translate(-2px, -2px);
  border-color: var(--signal);
  box-shadow: var(--shadow-hard);
}
.card__head { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.card__title { margin: 0; font-size: clamp(1.05rem, 1.8vw, 1.3rem); font-weight: 800; }
.card__title a { color: var(--mist); }
.card__title a:hover { color: var(--signal); }
.card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  border: 1px solid var(--line-strong);
  color: var(--silver);
  white-space: nowrap;
}
.tag--signal { border-color: var(--signal); color: var(--signal); }
.tag--violet { border-color: var(--violet); color: #B7A6FF; }
.tag--flare { border-color: var(--flare); color: var(--flare); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: var(--edge) solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease), background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}
.btn:hover { transform: translate(-2px, -2px); }
.btn:active { transform: translate(0, 0); }

.btn--signal {
  background: var(--signal);
  color: #04140E;
  box-shadow: 4px 4px 0 rgba(0, 229, 168, 0.28);
}
.btn--signal:hover { background: #22F3BC; color: #04140E; box-shadow: 6px 6px 0 rgba(0, 229, 168, 0.4); }

.btn--ghost {
  background: transparent;
  color: var(--mist);
  border-color: var(--line-strong);
}
.btn--ghost:hover { color: var(--signal); border-color: var(--signal); box-shadow: 4px 4px 0 rgba(0, 229, 168, 0.2); }

.btn--flare {
  background: var(--flare);
  color: #170500;
  box-shadow: 4px 4px 0 rgba(255, 90, 46, 0.25);
}
.btn--flare:hover { color: #170500; box-shadow: 6px 6px 0 rgba(255, 90, 46, 0.38); }

/* ---------- 面包屑 ---------- */
.breadcrumbs { padding-top: 20px; }
.breadcrumbs__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.breadcrumbs__item { display: flex; align-items: center; gap: 8px; margin: 0; }
.breadcrumbs__link { color: var(--silver); border-bottom: 1px solid transparent; }
.breadcrumbs__link:hover { color: var(--signal); border-bottom-color: var(--signal); }
.breadcrumbs__sep { color: var(--muted); }

/* ---------- 正文 ---------- */
.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.65;
  color: var(--mist);
}
.prose h2 { margin: 1.4em 0 0.5em; }
.prose h3 { margin: 1.3em 0 0.45em; }
.prose p { margin: 0 0 1.1em; }
.prose ul, .prose ol { margin: 0 0 1.1em; padding-left: 1.3em; }
.prose li { margin: 0 0 0.5em; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--signal); }
.prose strong { color: var(--mist); font-weight: 800; }
.prose blockquote {
  margin: 1.4em 0;
  padding: 14px 20px;
  border-left: 4px solid var(--signal);
  background: rgba(0, 229, 168, 0.06);
  color: var(--silver);
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 2px 6px;
  background: var(--deck);
  border: 1px solid var(--line);
}

/* ---------- 图片容器（页面阶段放置占位图或 SVG） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: var(--edge) solid var(--line-strong);
  background-color: var(--deck);
  background-image:
    linear-gradient(135deg, rgba(0, 229, 168, 0.12), transparent 58%),
    repeating-linear-gradient(90deg, rgba(159, 176, 184, 0.08) 0 1px, transparent 1px 16px),
    repeating-linear-gradient(0deg, rgba(159, 176, 184, 0.08) 0 1px, transparent 1px 16px);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(0, 229, 168, 0.28);
  pointer-events: none;
}
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 12px;
  background: var(--signal);
  color: #04140E;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 显现动效协议 ---------- */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 220ms var(--ease), transform 220ms var(--ease);
}
html[data-js] [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   头部：居中刊头 + 下方栏目带 + 滚动进度
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--ink);
  background-image: linear-gradient(180deg, rgba(0, 229, 168, 0.07), rgba(11, 22, 19, 0) 72%);
  border-bottom: var(--edge) solid var(--line-strong);
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 10px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

.header-kicker {
  margin: 0;
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.header-kicker::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 9px;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(0, 229, 168, 0.16);
  animation: ak-pulse 2.6s ease-in-out infinite;
}
@keyframes ak-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.masthead {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 4px 2px 7px;
  border-bottom: 3px solid var(--signal);
  text-decoration: none;
}
.masthead__mark {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  line-height: 0.88;
  letter-spacing: -0.06em;
  color: var(--signal);
  transform: skewX(-8deg);
}
.masthead__words { display: flex; flex-direction: column; line-height: 1.15; }
.masthead__brand {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.masthead__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.masthead:hover .masthead__brand { color: var(--signal); }
.masthead:hover .masthead__tag { color: var(--silver); }

.header-utility {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.utility-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--silver);
  padding: 7px 10px;
  border: 1px solid var(--line);
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}
.utility-link:hover, .utility-link:focus-visible {
  color: var(--ink);
  background: var(--signal);
  border-color: var(--signal);
}

.version { position: relative; }
.version-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  background: var(--flare);
  border: 1px solid var(--flare);
  color: #170500;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease);
}
.version-btn:hover { transform: translate(-1px, -1px); box-shadow: 3px 3px 0 rgba(255, 90, 46, 0.3); }
.version-btn[aria-expanded="true"] { background: var(--signal); border-color: var(--signal); color: #04140E; }
.version-btn__dot {
  width: 6px;
  height: 6px;
  background: currentColor;
  border-radius: 50%;
}

.version-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  z-index: 120;
  width: min(310px, 80vw);
  padding: 16px 18px;
  background: var(--deck);
  border: var(--edge) solid var(--signal);
  box-shadow: var(--shadow-hard);
}
.version-panel[hidden] { display: none; }
.version-panel__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal);
}
.version-panel__body { margin: 0 0 8px; font-size: 13px; line-height: 1.6; color: var(--silver); }
.version-panel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 栏目带 ---------- */
.header-nav-row {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 6px var(--gutter) 4px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: transparent;
  border: var(--edge) solid var(--line-strong);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.nav-toggle:hover { color: var(--signal); border-color: var(--signal); }
.nav-toggle[aria-expanded="true"] { color: var(--signal); border-color: var(--signal); }
.nav-toggle__bars {
  position: relative;
  display: inline-block;
  width: 18px;
  height: 10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform 180ms var(--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; }

.site-nav { display: block; }
.nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.nav-list__item { display: flex; margin: 0; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 13px 15px;
  color: var(--silver);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 7px;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms var(--ease);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--mist); }
.nav-link:hover::after, .nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--mist); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); background: var(--signal); }

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  overflow: hidden;
}
.scroll-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--signal), var(--cyan));
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 110px);
  background: var(--panel);
  border-top: 4px solid var(--signal);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--signal) 0 56px, var(--flare) 56px 68px, transparent 68px 124px);
  pointer-events: none;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) var(--gutter) 28px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.footer-col { min-width: 0; }
.footer-col--brand { border-left: var(--edge) solid var(--signal); padding-left: 18px; }

.footer-brand {
  margin: 0 0 6px;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--mist);
}
.footer-tag {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--signal);
}
.footer-legal {
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--silver);
}
.footer-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.footer-heading {
  margin: 0 0 14px;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
  border-bottom: var(--edge) solid var(--line);
}

.footer-contact { list-style: none; margin: 0; padding: 0; }
.footer-contact__item {
  margin: 0 0 10px;
  padding-left: 12px;
  border-left: 2px solid var(--line-strong);
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

.footer-links { list-style: none; margin: 0 0 16px; padding: 0; }
.footer-links__item { margin: 0 0 8px; }
.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--mist);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.footer-link:hover { color: var(--signal); border-bottom-color: var(--signal); }

.footer-note {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 30px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.footer-copy, .footer-stamp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .header-inner {
    grid-template-columns: auto 1fr;
    grid-template-areas: "brand utility";
  }
  .masthead { grid-area: brand; justify-self: start; }
  .header-utility { grid-area: utility; }
  .header-kicker { display: none; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .grid--2, .grid--3, .grid--split { grid-template-columns: minmax(0, 1fr); }

  .header-nav-row {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .nav-toggle { display: inline-flex; align-self: flex-start; }
  .site-nav { display: none; }
  .site-nav[data-open] { display: block; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list__item { border-top: 1px solid var(--line); }
  .nav-list__item:last-child { border-bottom: 1px solid var(--line); }
  .nav-link { display: block; padding: 15px 10px; }
  .nav-link::after { left: 10px; right: auto; width: 26px; bottom: 10px; }
  .nav-link[aria-current="page"] {
    background: rgba(0, 229, 168, 0.08);
    box-shadow: inset 3px 0 0 var(--signal);
  }

  .footer-inner { grid-template-columns: 1fr; padding-bottom: 20px; }
  .footer-col--brand { border-left: none; border-top: var(--edge) solid var(--signal); padding-left: 0; padding-top: 16px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .header-inner { padding-top: 12px; padding-bottom: 8px; gap: 10px; }
  .header-utility { flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
  .utility-link { padding: 6px 8px; font-size: 11px; }
  .version-btn { font-size: 11px; padding: 6px 9px; }
  .masthead__brand { font-size: 13px; letter-spacing: 0.1em; }
  .masthead__tag { font-size: 10px; }
  .masthead__mark { font-size: 1.5rem; }
  .panel { padding: 18px 16px; }
}

/* ============================================================
   动效降级
   ============================================================ */
@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;
  }
  html[data-js] [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .card:focus-within { transform: none; }
  .btn:hover { transform: none; }
}