/* ==========================================================================
   official-redhawk.com.cn — 共享样式 /assets/site.css
   深墨蓝基底 · 鹰羽灰蓝图线 · 暗铜金索引
   ========================================================================== */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  margin: 0;
  min-height: 100%;
  background: var(--c-paper);
  color: var(--text-on-light);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 800; line-height: 1.3; letter-spacing: .01em; }
p, ul, ol, dl, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
::selection { background: var(--c-brass); color: var(--c-ink); }

/* ---------- 变量 ---------- */
:root {
  --c-ink: #0E1B2A;
  --c-ink-2: #16283C;
  --c-ink-3: #1D3247;
  --c-paper: #E8EBEE;
  --c-paper-warm: #F3F0E7;
  --c-feather: #6E7A85;
  --c-stone: #8A8A83;
  --c-brass: #B0863F;
  --c-brass-lit: #D8AE63;
  --c-moss: #4A5A4A;
  --c-clay: #A9553C;
  --c-cinnabar: #9E3B33;

  --text-on-light: #1B2B3B;
  --text-on-light-soft: #4B5A67;
  --text-on-dark: #E8EBEE;
  --text-on-dark-soft: rgba(232, 235, 238, .72);

  --line: rgba(110, 122, 133, .34);
  --line-strong: rgba(110, 122, 133, .62);
  --line-on-dark: rgba(110, 122, 133, .28);
  --line-on-dark-strong: rgba(110, 122, 133, .5);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1260px;
  --gutter: clamp(1.125rem, 4vw, 2.5rem);
  --rail: 88px;
  --cut: 14px;
  --cut-sm: 9px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --t-fast: .24s;
  --t-base: .32s;
  --t-slow: .42s;
}

/* ---------- 焦点与辅助 ---------- */
:focus-visible {
  outline: 2px solid var(--c-brass-lit);
  outline-offset: 3px;
  border-radius: 1px;
}
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed;
  top: -120px; left: 1rem;
  z-index: 200;
  padding: .7rem 1.1rem;
  background: var(--c-brass);
  color: var(--c-ink);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ---------- 排版工具 ---------- */
.mono {
  font-family: var(--font-mono);
  font-size: .82em;
  letter-spacing: .08em;
  font-variant-numeric: tabular-nums;
}
.wrap {
  width: min(var(--wrap), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-brass);
}
.eyebrow::before {
  content: "";
  width: 18px; height: 1px;
  background: currentColor;
  flex: 0 0 auto;
}
.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-brass);
}
.prose { max-width: 34em; }
.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose h2 { font-size: clamp(21px, 2.4vw, 26px); margin: 2.2em 0 .7em; }
.prose h3 { font-size: 18px; margin: 1.8em 0 .55em; color: var(--c-ink-2); }
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.15em; }
.prose li { line-height: 1.7; margin-bottom: .4em; }
.prose ul li { list-style: none; position: relative; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: -1.05em; top: .78em;
  width: 6px; height: 1px;
  background: var(--c-brass);
}
.prose ol { list-style: decimal; }
.prose ol li::marker { color: var(--c-brass); font-family: var(--font-mono); font-size: .85em; }

/* ---------- 分区与网格 ---------- */
.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section--dark { background: var(--c-ink); color: var(--text-on-dark); }
.section--ink2 { background: var(--c-ink-2); color: var(--text-on-dark); }
.section--paper { background: var(--c-paper-warm); }
.section--rule { border-top: 1px solid var(--line); }
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  z-index: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .66rem 1.15rem;
  border: 0;
  background: transparent;
  color: var(--c-brass-lit);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--btn-bg, transparent);
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));
  transition: background var(--t-fast) var(--ease);
}
.btn--solid { --btn-bg: var(--c-brass); color: var(--c-ink); }
.btn--solid:hover { --btn-bg: var(--c-brass-lit); color: var(--c-ink); }
.btn--ghost { --btn-bg: rgba(216, 174, 99, .14); color: var(--c-brass-lit); }
.btn--ghost:hover { --btn-bg: var(--c-brass); color: var(--c-ink); }
.btn--on-light { color: var(--c-ink); }
.btn--on-light.btn--ghost { --btn-bg: rgba(176, 134, 63, .16); color: #7C5B22; }
.btn--on-light.btn--ghost:hover { --btn-bg: var(--c-brass); color: var(--c-ink); }

/* ---------- 面板 ---------- */
.panel {
  padding: clamp(1.15rem, 2.4vw, 1.75rem);
  background: var(--c-paper-warm);
  border: 1px solid var(--line);
  color: var(--text-on-light);
}
.cut-panel {
  position: relative;
  padding: clamp(1.15rem, 2.4vw, 1.75rem);
  background: var(--c-ink-2);
  border: 1px solid var(--line-on-dark);
  color: var(--text-on-dark);
  box-shadow: inset 0 0 0 1px rgba(232, 235, 238, .02);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.cut-panel--light {
  background: var(--c-paper-warm);
  border-color: var(--line);
  color: var(--text-on-light);
}
.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: .8rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--line-on-dark);
}
.cut-panel--light .panel__head { border-bottom-color: var(--line); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .22rem .6rem;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .1em;
  border: 1px solid currentColor;
  color: var(--c-feather);
  white-space: nowrap;
}
.tag--moss { color: var(--c-moss); }
.tag--clay { color: var(--c-clay); }
.tag--cinnabar { color: var(--c-cinnabar); }
.tag--brass { color: var(--c-brass); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .6rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-feather);
}
.breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.breadcrumb a:hover { color: var(--c-brass); border-bottom-color: var(--c-brass); }
.breadcrumb__sep { color: var(--c-brass); opacity: .75; }
.breadcrumb--dark { color: var(--text-on-dark-soft); }
.breadcrumb--dark a:hover { color: var(--c-brass-lit); }

/* ---------- 图片 / 视觉容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(110, 122, 133, .18), rgba(14, 27, 42, .05)),
    var(--c-ink-2);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-on-dark-strong) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-on-dark) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
  opacity: .5;
}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--band { aspect-ratio: 21 / 9; }
.media-frame--cut { clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%); }
.media-frame__caption {
  display: block;
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--c-feather);
}

/* ---------- 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 蓝图索引栏（页面级使用） ---------- */
.blueprint-rail {
  display: none;
  position: fixed;
  top: 50%;
  left: calc((100vw - var(--wrap)) / 2 - var(--rail) - 1rem);
  transform: translateY(-50%);
  z-index: 40;
  width: 64px;
  padding: 0;
  margin: 0;
  border-left: 1px solid var(--line-on-dark-strong);
  list-style: none;
}
.blueprint-rail a {
  display: block;
  padding: .45rem 0 .45rem .9rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-feather);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.blueprint-rail a:hover { color: var(--c-brass); }
.blueprint-rail a[aria-current="true"] { color: var(--c-brass); border-left-color: var(--c-brass); }
@media (min-width: 1440px) {
  .blueprint-rail { display: block; }
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-ink);
  color: var(--text-on-dark);
  border-bottom: 1px solid var(--line-on-dark-strong);
}
.status-bar {
  background: var(--c-ink-2);
  border-bottom: 1px solid var(--line-on-dark);
  max-height: 80px;
  overflow: hidden;
  transition: max-height var(--t-base) var(--ease), opacity var(--t-fast) var(--ease);
}
.status-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .35rem 1rem;
  min-height: 34px;
  padding-block: 5px;
}
.status-bar__text {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-on-dark-soft);
}
.status-bar__meta {
  display: flex;
  align-items: center;
  gap: .7rem;
  color: var(--c-brass-lit);
}
.status-bar__meta .mono { font-size: 11px; }
.status-bar__sep {
  width: 1px; height: 10px;
  background: var(--line-on-dark-strong);
}
.status-dot {
  width: 6px; height: 6px;
  flex: 0 0 auto;
  background: var(--c-moss);
  box-shadow: 0 0 0 3px rgba(74, 90, 74, .28);
}
.site-header.is-condensed .status-bar {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}

.brand-bar { background: var(--c-ink); }
.brand-bar__inner {
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.5rem);
  min-height: 68px;
  transition: min-height var(--t-base) var(--ease);
}
.site-header.is-condensed .brand-bar__inner { min-height: 54px; }

.brand-mark {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: .7rem;
  text-decoration: none;
  color: var(--text-on-dark);
}
.brand-mark__glyph {
  display: block;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  color: var(--c-brass);
}
.brand-mark__glyph svg { display: block; width: 100%; height: 100%; }
.glyph-frame { fill: none; stroke: currentColor; stroke-width: 1.2; }
.glyph-wing { fill: currentColor; }
.brand-mark__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-mark__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .1em;
}
.brand-mark__sub {
  font-size: 9.5px;
  letter-spacing: .16em;
  color: var(--c-brass-lit);
  text-transform: uppercase;
}

.primary-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: .1rem;
}
.primary-nav__list a {
  position: relative;
  display: block;
  padding: .55rem .7rem;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--text-on-dark-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease);
}
.primary-nav__list a::after {
  content: "";
  position: absolute;
  left: .7rem; right: .7rem; bottom: .22rem;
  height: 1px;
  background: var(--c-brass-lit);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base) var(--ease);
}
.primary-nav__list a:hover { color: var(--text-on-dark); }
.primary-nav__list a:hover::after { transform: scaleX(1); }
.primary-nav__list a[aria-current="page"] { color: var(--c-brass-lit); }
.primary-nav__list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-brass);
}

.header-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.index-link {
  padding: .35rem .2rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--text-on-dark-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.index-link:hover { color: var(--c-brass-lit); border-bottom-color: var(--c-brass); }

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 40px;
  padding: 0;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line-on-dark-strong);
  color: var(--text-on-dark);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav-toggle:hover { border-color: var(--c-brass); color: var(--c-brass-lit); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}
.nav-toggle__bars > span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: top var(--t-base) var(--ease), transform var(--t-base) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav-toggle__bars > span:nth-child(1) { top: 0; }
.nav-toggle__bars > span:nth-child(2) { top: 5.25px; }
.nav-toggle__bars > span:nth-child(3) { top: 10.5px; }
.nav-toggle[data-open] .nav-toggle__bars > span:nth-child(1) { top: 5.25px; transform: rotate(45deg); }
.nav-toggle[data-open] .nav-toggle__bars > span:nth-child(2) { opacity: 0; }
.nav-toggle[data-open] .nav-toggle__bars > span:nth-child(3) { top: 5.25px; transform: rotate(-45deg); }

.scroll-progress {
  position: absolute;
  left: 0; bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-brass), var(--c-brass-lit));
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 2;
  pointer-events: none;
}

/* ---------- 头部：移动端 ---------- */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    left: 0; right: 0; top: 100%;
    display: block;
    background: var(--c-ink-2);
    border-top: 1px solid var(--line-on-dark);
    border-bottom: 1px solid var(--line-on-dark-strong);
    padding: .35rem 0 .8rem;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--t-base) var(--ease), transform var(--t-base) var(--ease), visibility var(--t-base) linear;
  }
  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav__list li { border-bottom: 1px solid var(--line-on-dark); }
  .primary-nav__list li:last-child { border-bottom: 0; }
  .primary-nav__list a {
    padding: .95rem var(--gutter);
    font-size: 15px;
    color: var(--text-on-dark);
  }
  .primary-nav__list a::after { display: none; }
  .primary-nav__list a[aria-current="page"] {
    color: var(--c-brass-lit);
    box-shadow: inset 3px 0 0 0 var(--c-brass);
    background: rgba(176, 134, 63, .07);
  }
}
@media (max-width: 640px) {
  .header-actions .btn { display: none; }
  .brand-bar__inner { min-height: 58px; }
}
@media (max-width: 460px) {
  .brand-mark__sub { display: none; }
  .status-bar__meta { display: none; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--c-ink);
  color: var(--text-on-dark);
  padding-block: 0 clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--line-on-dark-strong);
}
.footer-ruler {
  height: 10px;
  border-bottom: 1px solid var(--line-on-dark);
  background-image:
    linear-gradient(to right, var(--line-on-dark-strong) 1px, transparent 1px),
    linear-gradient(to right, var(--line-on-dark) 1px, transparent 1px);
  background-size: 24px 4px, 120px 9px;
  background-position: 0 0, 0 0;
  background-repeat: repeat-x, repeat-x;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: 1.25rem 3rem;
  align-items: start;
  padding-block: clamp(2rem, 4vw, 2.75rem) 0;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: .8rem;
}
.footer-brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.footer-brand__name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .08em;
}
.footer-brand__sub {
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--c-brass-lit);
}
.footer-lede {
  max-width: 46em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-on-dark-soft);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.75rem 1.25rem;
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line-on-dark);
}
.footer-col__title {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .85rem;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-brass-lit);
}
.footer-col__title .mono {
  font-size: 10.5px;
  color: var(--c-brass);
  opacity: .85;
}
.footer-col__list li { margin-bottom: .5rem; }
.footer-col__list a {
  display: inline-block;
  font-size: 14px;
  color: var(--text-on-dark-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.footer-col__list a:hover { color: var(--c-brass-lit); border-bottom-color: var(--c-brass); }

.footer-base {
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-on-dark);
  display: grid;
  gap: .35rem;
}
.footer-contact {
  font-size: 12.5px;
  color: var(--c-brass-lit);
  overflow-wrap: anywhere;
}
.footer-address,
.footer-legal {
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--c-stone);
}
.footer-legal { letter-spacing: .04em; }

@media (max-width: 899px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .footer-base {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: baseline;
  }
  .footer-legal { grid-column: 2; text-align: right; }
}

/* ---------- 标签页（V1–V4 权益对比） ---------- */
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  border-bottom: 1px solid var(--line-on-dark);
  margin-bottom: 1.25rem;
}
.tab {
  position: relative;
  padding: .6rem 1rem;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--text-on-dark-soft);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.tab:hover { color: var(--text-on-dark); }
.tab[aria-selected="true"] {
  color: var(--c-brass-lit);
  border-bottom-color: var(--c-brass);
}
.tabs--light .tabs__list { border-bottom-color: var(--line); }
.tabs--light .tab { color: var(--text-on-light-soft); }
.tabs--light .tab[aria-selected="true"] { color: #7C5B22; border-bottom-color: var(--c-brass); }

/* ---------- 复制按钮 ---------- */
[data-copy] {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .3rem .65rem;
  background: transparent;
  border: 1px solid var(--line-on-dark-strong);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--text-on-dark-soft);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
[data-copy]:hover { color: var(--c-brass-lit); border-color: var(--c-brass); }
[data-copy].is-copied { color: var(--c-moss); border-color: var(--c-moss); }

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