/* =========================================================
   金博指南 · 共享样式 /assets/site.css
   结构：重置 → 变量 → 基础排版 → 工具类 → 命令栏头部
        → 页脚 → 通用组件 → 响应式 → 无障碍
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, select, textarea { font: inherit; }

:root {
  /* 品牌色 */
  --gold: #C9A227;
  --gold-bright: #E3C15A;
  --gold-deep: #8A6814;
  --ink: #0A1A2A;
  --ink-2: #132D45;
  --bg: #EEF2F4;
  --paper: #FBFCFD;
  --graphite: #394754;
  --ok: #168C7E;
  --amber: #B86B16;
  --cyan: #0E7C9A;
  --danger: #B23A2E;

  /* 线条与半透明 */
  --line: rgba(10, 26, 42, .13);
  --line-strong: rgba(10, 26, 42, .3);
  --on-ink-line: rgba(227, 193, 90, .22);
  --on-ink-text: rgba(251, 252, 253, .74);
  --on-ink-muted: rgba(251, 252, 253, .62);

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 字号阶梯 */
  --step--1: 12px;
  --step-0: 14px;
  --step-1: 16px;
  --step-2: 20px;
  --step-3: clamp(22px, 2.4vw, 28px);
  --step-4: clamp(28px, 3.4vw, 40px);
  --step-5: clamp(36px, 4.8vw, 56px);
  --step-6: clamp(44px, 6.2vw, 72px);

  /* 布局 */
  --wrap: 1240px;
  --gutter: clamp(16px, 3.2vw, 40px);
  --radius: 2px;
  --cut: 16px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 180ms;
}

/* ------------------------- 基础排版 ------------------------- */
body {
  background-color: var(--bg);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1.26;
  color: var(--ink);
}

h1 { font-size: var(--step-5); letter-spacing: .01em; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }

::selection { background: var(--gold); color: var(--ink); }

#main-content { scroll-margin-top: 104px; }

/* ------------------------- 工具类 ------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 18px;
  transform: translateY(-180%);
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ------------------------- 命令栏头部 ------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(201, 162, 39, .34);
  box-shadow: 0 14px 28px -24px rgba(10, 26, 42, .95);
}

.cmdbar { position: relative; }

.cmdbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 54px;
  padding-block: 9px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--gold-bright), var(--gold) 48%, var(--gold-deep));
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}
.brand__mark::before {
  content: "";
  width: 12px;
  height: 12px;
  background: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% 60%, 60% 100%, 0 100%);
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}
.brand__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .14em;
  color: var(--paper);
}
.brand__line {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  color: rgba(227, 193, 90, .88);
  white-space: nowrap;
}

/* 右侧工具区 */
.cmdbar__tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.cmd-search {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  color: var(--on-ink-text);
  background: rgba(19, 45, 69, .72);
  border: 1px solid rgba(227, 193, 90, .28);
  border-radius: var(--radius);
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.cmd-search:hover {
  color: var(--paper);
  border-color: var(--gold);
  background: var(--ink-2);
}
.cmd-search__glyph {
  position: relative;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
}
.cmd-search__glyph::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 6px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(45deg);
}

.kbd {
  display: inline-block;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: .06em;
  color: var(--gold-bright);
  background: rgba(201, 162, 39, .1);
  border: 1px solid rgba(227, 193, 90, .34);
  border-radius: var(--radius);
}

/* 状态胶囊 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  white-space: nowrap;
}
.chip--status {
  color: var(--gold-bright);
  border-color: rgba(227, 193, 90, .4);
  background: rgba(227, 193, 90, .08);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.chip--status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(22, 140, 126, .2);
}
.chip--status:hover {
  border-color: var(--gold-bright);
  background: rgba(227, 193, 90, .17);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--gold-bright);
  background: rgba(19, 45, 69, .8);
  border: 1px solid rgba(227, 193, 90, .38);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--gold-bright); background: var(--ink-2); }
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* 主导航 */
.nav {
  border-top: 1px solid rgba(227, 193, 90, .16);
  background: linear-gradient(180deg, rgba(19, 45, 69, .62), rgba(10, 26, 42, 0));
}
.nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav__list::-webkit-scrollbar { display: none; }
.nav__item { flex: 0 0 auto; }

.nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 14px 12px;
  color: var(--on-ink-muted);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav__link:hover {
  color: var(--paper);
  background: rgba(227, 193, 90, .08);
  border-bottom-color: rgba(227, 193, 90, .45);
}
.nav__link[aria-current="page"] {
  color: var(--gold-bright);
  background: rgba(201, 162, 39, .1);
  border-bottom-color: var(--gold);
}
.nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  width: 18px;
  height: 2px;
  background: var(--gold-bright);
}
.nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  color: rgba(227, 193, 90, .55);
}
.nav__link[aria-current="page"] .nav__index { color: var(--gold-bright); }

/* 滚动进度刻度 */
.progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(227, 193, 90, .13);
  pointer-events: none;
}
.progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold) 55%, var(--gold-bright));
  transition: transform 120ms linear;
}

/* ------------------------- 页脚 ------------------------- */
.site-footer {
  margin-top: clamp(40px, 5vw, 72px);
  background: var(--ink);
  color: var(--on-ink-text);
  border-top: 1px solid rgba(201, 162, 39, .3);
}

.ruler {
  height: 10px;
  background: repeating-linear-gradient(90deg, rgba(201, 162, 39, .5) 0 1px, transparent 1px 14px);
  border-bottom: 1px solid rgba(227, 193, 90, .16);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(22px, 3vw, 48px);
  padding-block: clamp(34px, 4.4vw, 60px) clamp(26px, 3.2vw, 44px);
}

.footer__brand { min-width: 0; }
.footer__brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--paper);
}
.footer__brand-link::before {
  content: "";
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  background: linear-gradient(140deg, var(--gold-bright), var(--gold) 50%, var(--gold-deep));
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}
.footer__brand-summary {
  margin-top: 14px;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-ink-muted);
}
.footer__brand-meta {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  color: rgba(227, 193, 90, .8);
}

.footer__col { min-width: 0; }
.footer__contact { min-width: 0; }

.footer__col-title {
  padding-bottom: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: rgba(227, 193, 90, .9);
  border-bottom: 1px solid rgba(227, 193, 90, .2);
}

.footer__links { display: grid; gap: 2px; }
.footer__links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--on-ink-text);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer__links a::before {
  content: "";
  width: 6px;
  height: 1px;
  background: rgba(227, 193, 90, .5);
  transition: width var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.footer__links a:hover {
  color: var(--gold-bright);
  transform: translateX(2px);
}
.footer__links a:hover::before {
  width: 12px;
  background: var(--gold-bright);
}
.footer__links a:focus-visible { color: var(--gold-bright); }

.footer__contact-list { display: grid; gap: 12px; }
.footer__contact-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14px;
}
.footer__contact-label {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(227, 193, 90, .75);
}
.footer__contact-value {
  color: rgba(251, 252, 253, .88);
  word-break: break-word;
}
.footer__note {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid rgba(201, 162, 39, .5);
  font-size: 13px;
  line-height: 1.8;
  color: rgba(251, 252, 253, .56);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px 24px;
  border-top: 1px solid rgba(227, 193, 90, .16);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: rgba(251, 252, 253, .48);
}
.footer__legal-copy { color: rgba(251, 252, 253, .56); }
.footer__legal-icp { color: rgba(227, 193, 90, .72); }
.footer__legal-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer__legal-links a {
  color: rgba(251, 252, 253, .6);
  transition: color var(--dur) var(--ease);
}
.footer__legal-links a:hover { color: var(--gold-bright); }

/* ------------------------- 通用按钮 ------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.4;
  text-align: center;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--gold {
  color: #1A1305;
  background: linear-gradient(135deg, var(--gold-bright), var(--gold) 55%, var(--gold-deep));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .28), 0 10px 20px -14px rgba(201, 162, 39, .95);
}
.btn--gold:hover {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .38), 0 14px 24px -14px rgba(201, 162, 39, 1);
}
.btn--ghost {
  color: var(--ink);
  background: var(--paper);
  border-color: var(--line-strong);
}
.btn--ghost:hover {
  color: var(--gold-deep);
  border-color: var(--gold-deep);
}
.btn--sm { padding: 8px 14px; font-size: 13px; }

/* ------------------------- 分节与索引 ------------------------- */
.section { padding-block: clamp(34px, 4.4vw, 64px); }
.section--tight { padding-block: clamp(22px, 3vw, 40px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 2.4vw, 32px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold-deep);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--gold);
}

.idx {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold-deep);
}

.tick-strip {
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 12px);
}

/* ------------------------- 面板 ------------------------- */
.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 2vw, 26px);
}

.panel--cut {
  --cut: 18px;
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  padding: clamp(20px, 2.2vw, 28px);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

.panel--ink {
  background: linear-gradient(160deg, var(--ink-2), var(--ink));
  border-color: rgba(227, 193, 90, .28);
  color: var(--on-ink-text);
}
.panel--ink h2,
.panel--ink h3,
.panel--ink h4 { color: var(--paper); }

/* ------------------------- 状态标签 ------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--graphite);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.tag--ok { color: #0F6B60; border-color: rgba(22, 140, 126, .45); background: rgba(22, 140, 126, .1); }
.tag--warn { color: #8A4F10; border-color: rgba(184, 107, 22, .45); background: rgba(184, 107, 22, .1); }
.tag--info { color: #0A5D75; border-color: rgba(14, 124, 154, .45); background: rgba(14, 124, 154, .1); }
.tag--danger { color: #8B2B22; border-color: rgba(178, 58, 46, .45); background: rgba(178, 58, 46, .1); }

/* ------------------------- 提示块 ------------------------- */
.callout {
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
  background: rgba(201, 162, 39, .08);
  border-left: 3px solid var(--gold);
}
.callout--ok { background: rgba(22, 140, 126, .08); border-left-color: var(--ok); }
.callout--warn { background: rgba(184, 107, 22, .09); border-left-color: var(--amber); }

/* ------------------------- 网格 ------------------------- */
.grid { display: grid; gap: clamp(14px, 1.8vw, 22px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

/* ------------------------- 面包屑 ------------------------- */
.breadcrumb { padding-block: 18px 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: rgba(57, 71, 84, .74);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(138, 104, 20, .55);
}
.breadcrumb__link {
  color: var(--cyan);
  transition: color var(--dur) var(--ease);
}
.breadcrumb__link:hover {
  color: var(--gold-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.breadcrumb__item[aria-current="page"] { color: var(--graphite); }

/* ------------------------- 正文容器 ------------------------- */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 1.9em; font-size: var(--step-3); }
.prose h3 { margin-top: 1.5em; font-size: var(--step-2); }
.prose ul { display: grid; gap: 8px; }
.prose ul li { position: relative; padding-left: 20px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 2px;
  background: var(--gold);
}
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--gold-deep); }
.prose strong { color: var(--ink); font-weight: 700; }
.prose code {
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: .92em;
  color: var(--ink-2);
  background: rgba(10, 26, 42, .06);
  border-radius: var(--radius);
}

/* ------------------------- 图片容器基础规则 ------------------------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(10, 26, 42, .06), rgba(201, 162, 39, .12)),
    repeating-linear-gradient(90deg, rgba(10, 26, 42, .06) 0 1px, transparent 1px 24px),
    var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.media-frame > img,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--gold-bright);
  background: rgba(10, 26, 42, .84);
}

.media-note {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: rgba(57, 71, 84, .72);
}

/* ------------------------- 响应式 ------------------------- */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cmd-search__label { display: none; }
  .cmd-search { padding: 7px 9px; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 90;
    max-height: min(72vh, 560px);
    overflow-y: auto;
    background: var(--ink-2);
    border-top: 1px solid rgba(227, 193, 90, .22);
    box-shadow: 0 28px 44px -30px rgba(0, 0, 0, .95);
  }
  .nav[data-open] { display: block; }

  .nav__list {
    flex-direction: column;
    gap: 0;
    padding-block: 8px 18px;
    overflow: visible;
  }
  .nav__item { width: 100%; }
  .nav__link {
    padding: 13px 0;
    font-size: 15px;
    border-bottom: 1px solid rgba(227, 193, 90, .12);
  }
  .nav__link[aria-current="page"] {
    background: transparent;
    border-bottom-color: rgba(227, 193, 90, .35);
  }
  .nav__link[aria-current="page"]::before {
    left: 0;
    top: 50%;
    width: 3px;
    height: 18px;
    transform: translateY(-50%);
  }
  .nav__link[aria-current="page"] { padding-left: 14px; }

  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--12 > .span-3,
  .grid--12 > .span-4,
  .grid--12 > .span-5,
  .grid--12 > .span-6,
  .grid--12 > .span-7,
  .grid--12 > .span-8,
  .grid--12 > .span-9 { grid-column: span 6; }
}

@media (max-width: 720px) {
  .brand__line { display: none; }
  .brand__title { font-size: 16px; letter-spacing: .1em; }
  .cmdbar__inner { min-height: 50px; gap: 10px; }
  .chip--status { display: none; }
  .btn--gold.btn--sm { padding: 7px 11px; font-size: 12px; letter-spacing: .02em; }
  .cmdbar__tools { gap: 8px; }

  .footer__legal { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__brand-summary { max-width: none; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid--12 > .span-3,
  .grid--12 > .span-4,
  .grid--12 > .span-5,
  .grid--12 > .span-6,
  .grid--12 > .span-7,
  .grid--12 > .span-8,
  .grid--12 > .span-9,
  .grid--12 > .span-12 { grid-column: span 6; }

  .footer__contact-row { grid-template-columns: 44px minmax(0, 1fr); }
}

/* ------------------------- 无障碍 ------------------------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--radius);
}
.site-footer :focus-visible {
  outline-color: var(--gold-bright);
}
.site-header :focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .btn:hover,
  .footer__links a:hover { transform: none; }
  .progress__bar { transition: none; }
  .skip-link { transition: none; }
}