/* ==========================================================================
   华体会app · 共享站点样式  /assets/site.css
   体系：深墨绿夜灯底 + 荧光青数据高亮 + 暖橙行动点 + 暖纸色贴纸卡
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
[hidden] { display: none !important; }
::selection { background: var(--cyan); color: var(--ink-900); }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #07130F;
  --ink-800: #0E2A22;
  --ink-700: #123A2E;
  --ink-600: #1C5C48;
  --paper: #F3EADA;
  --paper-2: #E7DBC6;
  --paper-line: #D6C9AF;
  --cyan: #3DF2C6;
  --cyan-ink: #0A6E5A;
  --orange: #FF8A2B;
  --orange-deep: #B4550D;
  --alert: #FF5A3D;
  --text: #F7FBF8;
  --text-muted: #A7C0B6;
  --ink-text: #0B1F19;
  --ink-text-muted: #43594F;

  --font-display: "Archivo Narrow", "Oswald", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --header-h: 64px;
  --gap: 24px;
  --shell: 1440px;
  --radius: 2px;
  --shadow-hard: 8px 8px 0 var(--ink-600);
  --shadow-hard-soft: 8px 8px 0 rgba(28, 92, 72, .55);
  --shadow-paper: 8px 8px 0 rgba(28, 92, 72, .35);
  --ease: cubic-bezier(.22, .8, .2, 1);
  --dur: 420ms;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1200px 620px at 82% -12%, rgba(61, 242, 198, .12), transparent 62%),
    radial-gradient(900px 520px at 2% 106%, rgba(255, 138, 43, .09), transparent 60%),
    repeating-linear-gradient(0deg, rgba(28, 92, 72, .16) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(90deg, rgba(28, 92, 72, .16) 0 1px, transparent 1px 76px);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 900; letter-spacing: -.02em; line-height: 1.12; }
h1 { font-size: clamp(2.2rem, 5vw, 3.9rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3 { font-size: 1.25rem; line-height: 1.3; }
h4 { font-size: 1rem; letter-spacing: .02em; }
p { max-width: 36em; }
strong { color: var(--cyan); font-weight: 700; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }
.site-footer :focus-visible,
.card--paper :focus-visible { outline-color: var(--orange-deep); }

.display,
.num-xl {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(3.5rem, 9vw, 7.5rem);
  line-height: .92;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- 4. 布局容器 ---------- */
.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 20px; }
main, .site-main { display: block; padding-top: var(--header-h); }
.site-main { padding-bottom: 48px; }
.stack > * + * { margin-top: var(--gap); }
.cluster { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- 5. 跳过导航 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 16px;
  background: var(--orange);
  color: var(--ink-900);
  font-weight: 800;
  font-size: .9rem;
  border: 2px solid var(--ink-900);
  box-shadow: 4px 4px 0 var(--ink-600);
  transition: transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); outline: none; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  background: var(--ink-800);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .9rem;
  line-height: 1.2;
  letter-spacing: .02em;
  box-shadow: 4px 4px 0 rgba(28, 92, 72, .8);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease),
              background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: 6px 6px 0 rgba(28, 92, 72, .9); border-color: var(--cyan); color: var(--cyan); }
.btn:active { transform: translateY(1px); box-shadow: 2px 2px 0 rgba(28, 92, 72, .8); }
.btn--cta { background: var(--orange); color: var(--ink-900); border-color: var(--ink-900); box-shadow: 4px 4px 0 rgba(28, 92, 72, .9); }
.btn--cta:hover { background: #FF9E4D; color: var(--ink-900); border-color: var(--ink-900); }
.btn--ghost { background: transparent; border-color: var(--cyan); color: var(--cyan); box-shadow: none; }
.btn--ghost:hover { background: rgba(61, 242, 198, .12); color: var(--cyan); }
.btn--paper { background: var(--paper); color: var(--ink-text); border-color: var(--ink-900); box-shadow: 4px 4px 0 rgba(28, 92, 72, .6); }
.btn--paper:hover { background: #FFF6E8; color: var(--ink-text); border-color: var(--ink-900); }
.btn--sm { padding: 7px 12px; font-size: .8rem; }
.btn--block { width: 100%; }

/* ---------- 7. 头部 · 紧凑命令栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--ink-900);
  border-bottom: 2px solid var(--cyan);
  box-shadow: 0 8px 0 rgba(28, 92, 72, .28);
}
.site-header[data-condensed] { --header-h: 52px; }
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: var(--shell);
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 20px;
  transition: height .25s var(--ease);
}

/* 品牌 */
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; padding: 4px 2px; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  border: 2px solid var(--ink-600);
  box-shadow: 3px 3px 0 var(--ink-600);
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -.01em;
  color: var(--text);
  white-space: nowrap;
}
.brand__sub {
  padding-left: 8px;
  border-left: 2px solid var(--ink-600);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--cyan);
  white-space: nowrap;
  transition: opacity .2s var(--ease);
}
.site-header[data-condensed] .brand__sub { opacity: 0; }

/* 命令栏 */
.cmd-nav { flex: 1 1 auto; display: flex; justify-content: center; min-width: 0; }
.cmd-nav__list { display: flex; align-items: center; gap: 2px; }
.cmd-nav__item { display: block; }
.cmd-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.cmd-nav__link:hover { color: var(--text); background: var(--ink-800); border-color: var(--ink-600); }
.cmd-nav__link[aria-current="page"] {
  color: var(--cyan);
  background: var(--ink-800);
  border-color: var(--ink-600);
  box-shadow: inset 3px 0 0 var(--cyan);
}
.cmd-nav__idx { font-family: var(--font-mono); font-size: .7rem; color: rgba(61, 242, 198, .55); }
.cmd-nav__link[aria-current="page"] .cmd-nav__idx { color: var(--cyan); }

/* 头部右侧 */
.site-header__actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; margin-left: auto; }
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 2px solid var(--ink-600);
  background: rgba(14, 42, 34, .9);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--text-muted);
  white-space: nowrap;
  max-width: none;
}
.status-chip__dot { width: 9px; height: 9px; flex: 0 0 auto; background: var(--cyan); animation: hb-pulse 2.4s infinite; }
.status-chip[data-status="live"] .status-chip__label { color: var(--cyan); }
.status-chip[data-status="done"] .status-chip__dot { background: var(--text-muted); animation: none; box-shadow: none; }
.status-chip[data-status="done"] .status-chip__label { color: var(--text-muted); }
.status-chip__meta { color: var(--text-muted); }
@keyframes hb-pulse {
  0% { box-shadow: 0 0 0 0 rgba(61, 242, 198, .65); }
  70% { box-shadow: 0 0 0 10px rgba(61, 242, 198, 0); }
  100% { box-shadow: 0 0 0 0 rgba(61, 242, 198, 0); }
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  background: var(--ink-800);
  color: var(--text);
  font-weight: 700;
  font-size: .85rem;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] { background: var(--cyan); color: var(--ink-900); border-color: var(--ink-600); }
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bar { display: block; height: 2px; background: currentColor; transition: transform .2s var(--ease), opacity .2s var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: rotate(45deg) translateY(6px); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: rotate(-45deg) translateY(-6px); }
.nav-toggle__label { line-height: 1; }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  width: var(--progress, 0%);
  height: 3px;
  background: var(--orange);
  box-shadow: 0 0 12px rgba(255, 138, 43, .85);
  transition: width .1s linear;
}

/* ---------- 8. 页脚 · 暖纸色反色区 ---------- */
.site-footer {
  position: relative;
  margin-top: 64px;
  background: var(--paper);
  color: var(--ink-text);
  border-top: 2px solid var(--ink-900);
  box-shadow: 0 -8px 0 rgba(28, 92, 72, .45);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--orange) 0 28px, transparent 28px 56px);
  opacity: .85;
  pointer-events: none;
}
.site-footer__inner { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 52px 20px 24px; }
.site-footer__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding-bottom: 24px;
  border-bottom: 2px dashed var(--paper-line);
}
.footer-brand { font-family: var(--font-display); font-weight: 900; font-size: 1.6rem; letter-spacing: -.02em; color: var(--ink-text); }
.footer-brand__desc { font-size: .9rem; color: var(--ink-text-muted); }
.footer-brand__stamp {
  margin-left: auto;
  padding: 4px 10px;
  border: 2px solid var(--orange-deep);
  background: rgba(255, 138, 43, .1);
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  transform: rotate(-1.5deg);
}
.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--paper-line);
}
.footer-col { min-width: 0; }
.footer-col__title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--ink-text);
}
.footer-col__idx { font-family: var(--font-mono); font-size: .72rem; color: var(--orange-deep); }
.footer-col__list { display: grid; gap: 10px; font-size: .9rem; color: var(--ink-text-muted); }
.footer-col__list--plain li { position: relative; padding-left: 14px; }
.footer-col__list--plain li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .85em;
  width: 6px;
  height: 2px;
  background: var(--orange-deep);
}
.footer-link {
  display: inline-block;
  padding-bottom: 1px;
  border-bottom: 2px solid transparent;
  color: var(--ink-text-muted);
  transition: color .16s var(--ease), border-color .16s var(--ease), transform .16s var(--ease);
}
.footer-link:hover { color: var(--cyan-ink); border-bottom-color: var(--cyan-ink); transform: translateX(2px); }
.site-footer .mono { color: var(--ink-text); font-size: .84rem; word-break: break-all; }
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--ink-text-muted);
}
.legal-line { max-width: none; }

/* ---------- 9. 面包屑 ---------- */
.crumbs { margin: 0 0 20px; }
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--text-muted);
}
.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs__item + .crumbs__item::before { content: "/"; color: var(--ink-600); }
.crumbs__link { color: var(--text-muted); border-bottom: 2px solid transparent; }
.crumbs__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.crumbs__item[aria-current="page"] { color: var(--cyan); }

/* ---------- 10. 章节头 ---------- */
.sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px 16px;
  margin-bottom: var(--gap);
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink-600);
}
.sec-idx {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}
.sec-title { font-family: var(--font-display); font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 900; letter-spacing: -.02em; }
.sec-note { margin-left: auto; max-width: 32ch; font-size: .85rem; color: var(--text-muted); }

/* ---------- 11. Bento 网格 ---------- */
.bento { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.bento > * { grid-column: 1 / -1; }

/* ---------- 12. 卡片 ---------- */
.card {
  position: relative;
  padding: 20px;
  background: var(--ink-800);
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: 12px 12px 0 var(--ink-600); border-color: var(--cyan); }
.card .card__title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 900; letter-spacing: -.01em; }
.card__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.card__foot { margin-top: 16px; padding-top: 12px; border-top: 2px solid var(--ink-600); font-size: .85rem; color: var(--text-muted); }
.card--paper { background: var(--paper); color: var(--ink-text); border-color: var(--paper-line); box-shadow: var(--shadow-paper); }
.card--paper .card__foot { border-top-color: var(--paper-line); color: var(--ink-text-muted); }
.card--paper .card__title { color: var(--ink-text); }
.card--focus { border-color: var(--cyan); }

/* ---------- 13. 数据组件 ---------- */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.stat__value {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.stat__unit { margin-left: 4px; font-size: .8rem; font-weight: 500; color: var(--text-muted); }
.card--paper .stat__label { color: var(--ink-text-muted); }
.card--paper .stat__value { color: var(--cyan-ink); }
.trend { font-family: var(--font-mono); font-size: .78rem; }
.trend--up { color: var(--cyan); }
.trend--down { color: var(--alert); }

/* ---------- 14. 标签页 ---------- */
.tabs { display: block; }
.tabs__list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.tabs__btn {
  padding: 8px 14px;
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  font-weight: 700;
  font-size: .85rem;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.tabs__btn:hover { color: var(--text); background: var(--ink-800); }
.tabs__btn[aria-selected="true"] {
  background: var(--cyan);
  color: var(--ink-900);
  border-color: var(--ink-900);
  box-shadow: 4px 4px 0 rgba(28, 92, 72, .7);
}
.tabs__panel { animation: hb-fade .3s var(--ease); }
@keyframes hb-fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- 15. 媒体容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--ink-800);
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard-soft);
}
.media > img,
.media > svg,
.media > video { width: 100%; height: 100%; object-fit: cover; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--21x9 { aspect-ratio: 21 / 9; }
.media--paper { background: var(--paper-2); border-color: var(--paper-line); box-shadow: var(--shadow-paper); }
.media__ph {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 120px;
  padding: 16px;
  text-align: center;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  background-image:
    repeating-linear-gradient(135deg, rgba(61, 242, 198, .1) 0 10px, transparent 10px 20px),
    repeating-linear-gradient(45deg, rgba(28, 92, 72, .35) 0 2px, transparent 2px 14px);
}
.media--paper .media__ph { color: var(--ink-text-muted); }
.media__caption { margin-top: 10px; font-size: .8rem; color: var(--text-muted); }

/* ---------- 16. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 17. 响应式 ---------- */
@media (min-width: 768px) {
  .bento > .b-half { grid-column: span 6; }
  .bento > .b-third { grid-column: span 4; }
  .bento > .b-two-thirds { grid-column: span 8; }
  .bento > .b-full { grid-column: 1 / -1; }
}
@media (min-width: 1120px) {
  .bento > .b-quarter { grid-column: span 3; }
  .bento > .b-half { grid-column: span 6; }
  .bento > .b-third { grid-column: span 4; }
  .bento > .b-two-thirds { grid-column: span 8; }
  .bento > .b-focus { grid-column: span 8; }
}
@media (max-width: 1024px) {
  .site-header__inner { gap: 10px; }
  .brand__sub { display: none; }
  .cmd-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    display: block;
    z-index: 85;
    max-height: calc(100vh - var(--header-h));
    padding: 14px 18px 22px;
    overflow-y: auto;
    background: var(--ink-900);
    border-bottom: 2px solid var(--cyan);
    box-shadow: 0 12px 0 rgba(28, 92, 72, .38);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s linear;
  }
  .cmd-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
  .cmd-nav__list { display: grid; gap: 8px; }
  .cmd-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px;
    font-size: 1.05rem;
    background: var(--ink-800);
    border-color: var(--ink-600);
  }
  .cmd-nav__link[aria-current="page"] {
    border-color: var(--cyan);
    box-shadow: inset 4px 0 0 var(--cyan), 6px 6px 0 rgba(28, 92, 72, .6);
  }
  .cmd-nav__idx { font-size: .8rem; }
  .nav-toggle { display: inline-flex; }
  .site-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
}
@media (min-width: 1025px) {
  .nav-toggle { display: none; }
}
@media (max-width: 900px) {
  .status-chip__meta { display: none; }
  .site-header[data-condensed] .brand__sub { display: none; }
}
@media (max-width: 640px) {
  :root { --gap: 16px; }
  .shell, .site-header__inner, .site-footer__inner { padding-left: 16px; padding-right: 16px; }
  .status-chip { display: none; }
  .brand__name { font-size: 1rem; }
  .btn--cta { padding: 9px 14px; font-size: .82rem; }
  .nav-toggle__label { display: none; }
  .site-footer__cols { grid-template-columns: minmax(0, 1fr); }
  .footer-brand__stamp { margin-left: 0; }
  .sec-note { margin-left: 0; max-width: none; }
  .site-footer__legal { flex-direction: column; align-items: flex-start; }
}

/* ---------- 18. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 120ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .status-chip__dot { animation: none; box-shadow: none; }
  .card:hover, .btn:hover, .footer-link:hover { transform: none; }
  .site-header__inner { transition: none; }
}