/* ============================================================
   AYX 中文站 · /assets/site.css
   数字档案室：深空蓝底板 / 霓虹青检索光标 / 暖橙时间戳
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
main { display: block; }

/* ---------- 变量 ---------- */
:root {
  --ink-900: #060A14;
  --ink-800: #0B1220;
  --ink-700: #121C33;
  --ink-600: #1B2A4A;
  --cyan: #3FE0D0;
  --cyan-soft: #7FF0E4;
  --amber: #FF8A3D;
  --amber-soft: #FFC48A;
  --paper: #EEF3FB;
  --mist: #A9B8D0;
  --ok: #4ED8A5;
  --warn: #FF6B6B;
  --wrap: 1240px;
  --radius: 14px;
  --cut: 24px;
  --slant: 8deg;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 220ms;
  --font-sans: "HarmonyOS Sans", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 中文排版与底板 ---------- */
body {
  background-color: var(--ink-800);
  background-image:
    linear-gradient(rgba(27, 42, 74, .30) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 42, 74, .30) 1px, transparent 1px),
    radial-gradient(120% 80% at 82% -12%, rgba(63, 224, 208, .12), transparent 62%),
    radial-gradient(80% 60% at -6% 6%, rgba(255, 138, 61, .08), transparent 60%);
  background-size: 64px 64px, 64px 64px, auto, auto;
  background-attachment: fixed, fixed, scroll, scroll;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, .h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800; line-height: 1.08; letter-spacing: -.01em; }
h2, .h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; line-height: 1.2; }
h3, .h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; }
p { text-wrap: pretty; }
::selection { background: rgba(63, 224, 208, .28); color: var(--paper); }

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

/* ---------- 跳至主要内容 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: -120px;
  transform: translateX(-50%);
  z-index: 200;
  padding: 10px 20px;
  background: var(--cyan);
  color: #04211F;
  font-weight: 700;
  font-size: .9rem;
  border-radius: 0 0 12px 12px;
  transition: top 160ms var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}
.container--narrow { max-width: 820px; }
.section { padding-block: clamp(48px, 7vw, 96px); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.section-title { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 700; line-height: 1.2; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
  display: block;
  margin-bottom: 10px;
}
.lede { max-width: 62ch; color: var(--mist); font-size: clamp(1rem, 1.3vw, 1.12rem); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .04em; }
.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(63, 224, 208, .5), rgba(27, 42, 74, .35), transparent);
}
[data-section] { scroll-margin-top: 150px; }
#main-content { scroll-margin-top: 130px; }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--index { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }

/* ---------- 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--paper);
  --btn-bd: var(--ink-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--btn-bd);
  border-radius: 3px 14px 3px 14px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: .94rem;
  font-weight: 600;
  letter-spacing: .03em;
  white-space: nowrap;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--solid {
  --btn-bg: linear-gradient(120deg, var(--amber), #FF9F5E);
  --btn-fg: #1A0F05;
  --btn-bd: transparent;
  box-shadow: 0 10px 24px -16px rgba(255, 138, 61, .95);
}
.btn--solid:hover { box-shadow: 0 16px 30px -14px rgba(255, 138, 61, 1); }
.btn--ghost { --btn-fg: var(--cyan); --btn-bd: rgba(63, 224, 208, .55); }
.btn--ghost:hover { --btn-bg: rgba(63, 224, 208, .10); --btn-bd: var(--cyan); --btn-fg: var(--cyan-soft); }
.btn--small { padding: 8px 14px; font-size: .84rem; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--ink-600);
  border-radius: 3px 10px 3px 10px;
  background: rgba(18, 28, 51, .72);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  line-height: 1.6;
}
.tag--legacy { border-style: dashed; border-color: rgba(255, 196, 138, .55); background: rgba(255, 138, 61, .10); color: var(--amber-soft); }
.tag--live { border-color: rgba(78, 216, 165, .5); background: rgba(78, 216, 165, .10); color: var(--ok); }
.tag--warn { border-color: rgba(255, 107, 107, .5); background: rgba(255, 107, 107, .10); color: var(--warn); }

/* ---------- 面包屑 ---------- */
.breadcrumb { padding-block: 20px 4px; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--mist);
}
.breadcrumb__list li { display: flex; align-items: center; gap: 8px; }
.breadcrumb__list li + li::before { content: "／"; color: rgba(63, 224, 208, .55); }
.breadcrumb__link { color: var(--mist); transition: color var(--dur) var(--ease); }
.breadcrumb__link:hover { color: var(--cyan); }
.breadcrumb__list [aria-current="page"] { color: var(--paper); }

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius);
  background: linear-gradient(158deg, #141F38, #0D1526 74%);
}
.panel--cut {
  border: 0;
  border-radius: 0;
  padding: clamp(20px, 2.6vw, 30px);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  background: linear-gradient(158deg, #16223C, #0C1424 74%);
  box-shadow: inset 0 0 0 1px rgba(43, 66, 110, .9);
}
.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(27, 42, 74, .95);
}
.panel__title { font-size: 1.05rem; font-weight: 700; letter-spacing: .02em; }
.panel__body { color: var(--mist); font-size: .95rem; }

/* ---------- 关键数字 ---------- */
.stat { display: grid; gap: 2px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--amber);
}
.stat__label { font-size: .82rem; letter-spacing: .08em; color: var(--mist); }

/* ---------- 标签切换面板 ---------- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink-600);
}
.tab {
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: 3px 12px 3px 12px;
  color: var(--mist);
  font-size: .92rem;
  font-weight: 600;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.tab:hover { color: var(--paper); background: rgba(63, 224, 208, .08); }
.tab[aria-selected="true"] { background: var(--cyan); border-color: var(--cyan); color: #04211F; }
.tab-panel { padding-top: 4px; }
.tab-panel[hidden] { display: none; }

/* ---------- 悬浮目录 ---------- */
.toc {
  position: fixed;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  z-index: 50;
  display: none;
  width: 158px;
  padding: 14px 12px;
  border: 1px solid var(--ink-600);
  border-radius: 3px 16px 3px 16px;
  background: linear-gradient(180deg, rgba(18, 28, 51, .94), rgba(6, 10, 20, .94));
  box-shadow: 0 24px 48px -32px rgba(0, 0, 0, .95);
}
.toc__title {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  color: var(--cyan);
}
.toc__list { display: grid; gap: 2px; max-height: 52vh; overflow: auto; }
.toc__link {
  display: block;
  padding: 6px 8px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: .8rem;
  line-height: 1.5;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.toc__link:hover { color: var(--paper); background: rgba(63, 224, 208, .08); }
.toc__link[aria-current="true"] { color: var(--cyan); border-left-color: var(--cyan); background: rgba(63, 224, 208, .10); }
.toc__top { width: 100%; margin-top: 12px; }

/* ---------- 图片容器（页面阶段放置素材） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--ink-600);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 100% at 12% 6%, rgba(63, 224, 208, .24), transparent 58%),
    radial-gradient(90% 80% at 92% 96%, rgba(255, 138, 61, .20), transparent 62%),
    linear-gradient(158deg, #16223C, #0A1120);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(63, 224, 208, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 224, 208, .10) 1px, transparent 1px);
  background-size: 36px 36px;
}
.media-frame__img, .media-frame img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame__inner {
  position: relative;
  z-index: 2;
  padding: clamp(16px, 2.4vw, 26px);
  color: var(--paper);
}
.media-frame--slant { clip-path: polygon(0 0, 100% 0, 100% calc(100% - 38px), 0 100%); }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  display: grid;
  gap: 20px;
  padding-left: 26px;
  border-left: 1px dashed var(--ink-600);
}
.timeline__item { position: relative; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink-800);
  transition: box-shadow var(--dur) var(--ease);
}
.timeline__item:hover::before { box-shadow: 0 0 0 5px rgba(63, 224, 208, .18); }
.timeline__time { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .12em; color: var(--amber); }
.timeline__title { margin: 4px 0; font-size: 1.05rem; font-weight: 600; }
.timeline__text { font-size: .92rem; color: var(--mist); }

/* ---------- 入场 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 300ms var(--ease), transform 300ms var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================================================
   页头：居中刊头 + 报头栏目
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, #0B1220 0%, #0B1220 72%, #0A101D 100%);
  border-bottom: 1px solid var(--ink-600);
  box-shadow: 0 22px 44px -36px rgba(0, 0, 0, .95);
}
.header-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(12px, 1.8vw, 20px) clamp(18px, 4vw, 40px) 0;
}
.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 14px;
  padding-bottom: clamp(10px, 1.4vw, 16px);
  border-bottom: 1px dashed rgba(27, 42, 74, .95);
}
.masthead__brand {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  text-align: center;
}
.masthead__mark {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .42em;
  text-indent: .42em;
  text-transform: uppercase;
  color: rgba(63, 224, 208, .85);
}
.masthead__name {
  font-size: clamp(1.4rem, 2.6vw, 2.05rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .06em;
  color: var(--paper);
}
.masthead__name::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 8px;
  background: var(--amber);
  transform: rotate(45deg) translateY(-3px);
}
.masthead__tag {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--mist);
}
.masthead__actions {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-toggle {
  grid-column: 1;
  justify-self: start;
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--ink-600);
  border-radius: 3px 12px 3px 12px;
  background: rgba(18, 28, 51, .82);
  color: var(--paper);
  font-size: .84rem;
  font-weight: 600;
  letter-spacing: .08em;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: rgba(63, 224, 208, .5); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle__label { font-family: var(--font-mono); letter-spacing: .16em; }

.site-nav { position: relative; z-index: 90; }
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(4px, 1.2vw, 16px);
  padding: 8px 0 12px;
}
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 3px 12px 3px 12px;
  color: var(--mist);
  font-size: .97rem;
  font-weight: 500;
  letter-spacing: .02em;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(63, 224, 208, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.site-nav__link:hover { color: var(--paper); transform: translateY(-2px); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] {
  color: var(--paper);
  background: rgba(63, 224, 208, .07);
  box-shadow: inset 0 0 0 1px rgba(63, 224, 208, .5);
}
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 50%;
  width: 3px;
  height: 18px;
  transform: translateY(-50%);
  border-radius: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(63, 224, 208, .85);
}
.nav-quick { display: none; }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(6, 10, 20, .74);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease);
}
.nav-scrim[data-open] { opacity: 1; pointer-events: auto; }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 2;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  pointer-events: none;
}

/* ============================================================
   页脚：档案柜下层
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  border-top: 1px solid var(--ink-600);
  background: linear-gradient(180deg, #0A101D, var(--ink-900) 46%);
  color: var(--mist);
  font-size: .94rem;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(320px, 42%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(63, 224, 208, 0));
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: clamp(24px, 4vw, 64px);
  padding: clamp(38px, 5vw, 64px) 0 clamp(26px, 3vw, 40px);
  border-bottom: 1px dashed var(--ink-600);
}
.footer-brand { max-width: 38ch; }
.footer-brand__name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--paper);
}
.footer-brand__name::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 14px rgba(63, 224, 208, .7);
}
.footer-brand__text { margin-top: 10px; font-size: .92rem; line-height: 1.8; color: var(--mist); }
.footer-contact { display: grid; gap: 10px; min-width: min(100%, 320px); }
.footer-contact__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 12px;
  font-size: .92rem;
}
.footer-contact__label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--cyan);
  white-space: nowrap;
}
.footer-contact__value { color: var(--paper); word-break: break-all; }
.footer-note { margin-top: 4px; font-size: .84rem; color: rgba(169, 184, 208, .85); }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(28px, 4vw, 44px) 0;
}
.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}
.footer-list { display: grid; gap: 9px; }
.footer-list__link {
  display: inline-block;
  font-size: .92rem;
  color: var(--mist);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-list__link:hover { color: var(--paper); transform: translateX(4px); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding: 22px 0 34px;
  border-top: 1px solid var(--ink-600);
  font-size: .82rem;
  color: rgba(169, 184, 208, .92);
}
.footer-legal__copy { font-family: var(--font-mono); letter-spacing: .04em; }
.footer-legal__links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-legal__links a { color: var(--mist); transition: color var(--dur) var(--ease); }
.footer-legal__links a:hover { color: var(--cyan); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 980px) {
  .grid--split { grid-template-columns: minmax(0, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  body { font-size: 16px; }
  body.nav-open { overflow: hidden; }

  .nav-toggle { display: inline-flex; }
  .masthead__actions .btn--ghost { display: none; }
  .masthead__actions .btn--solid { padding: 10px 16px; font-size: .88rem; }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 22px;
    width: min(86vw, 336px);
    padding: 26px 22px 40px;
    overflow-y: auto;
    border-right: 1px solid var(--ink-600);
    background: linear-gradient(180deg, #0B1220, var(--ink-900) 72%);
    transform: translateX(-104%);
    transition: transform 280ms var(--ease);
  }
  .site-nav[data-open] { transform: translateX(0); }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 0;
  }
  .site-nav__link { width: 100%; padding: 14px 16px; font-size: 1.02rem; }
  .site-nav__link::after { display: none; }
  .site-nav__link:hover { transform: translateY(-2px); background: rgba(63, 224, 208, .08); }
  .site-nav__link[aria-current="page"]::before { left: 0; }
  .site-nav__link[aria-current="page"]::after { display: block; transform: scaleX(0); }

  .nav-quick { display: block; padding-top: 20px; border-top: 1px dashed var(--ink-600); }
  .nav-quick__title {
    margin-bottom: 12px;
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .2em;
    color: var(--cyan);
  }
  .nav-quick__list { display: grid; gap: 8px; }
  .nav-quick__list a {
    display: block;
    padding: 11px 14px;
    border: 1px solid var(--ink-600);
    border-radius: 3px 12px 3px 12px;
    background: rgba(18, 28, 51, .62);
    color: var(--mist);
    font-size: .92rem;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }
  .nav-quick__list a:hover { color: var(--paper); border-color: rgba(63, 224, 208, .5); }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .header-inner { padding-top: 10px; }
  .masthead { gap: 10px; }
  .masthead__mark { display: none; }
  .masthead__tag { font-size: .64rem; letter-spacing: .1em; }
  .masthead__actions { gap: 6px; }
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .grid--index { grid-template-columns: minmax(0, 1fr); }
  .footer-top { flex-direction: column; gap: 26px; }
  .footer-legal { justify-content: flex-start; }
  .section { padding-block: clamp(40px, 9vw, 64px); }
}

@media (max-width: 420px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (min-width: 1600px) {
  .toc { display: block; }
}

/* ---------- 动效克制 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .btn:hover, .site-nav__link:hover, .footer-list__link:hover { transform: none; }
}