/* ============================================================
   九洲简体中文参数站 · /assets/site.css
   共享层：reset、变量、中文排版、头部、页脚、通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::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, dt,
ul, ol { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

b, strong { font-weight: 700; }

[id] { scroll-margin-top: 132px; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 基底 */
  --ink-900: #1B2A4A;
  --ink-950: #0F1A2E;
  --ink-700: #24375E;
  --ink-400: #5B7BB8;

  /* 纸面 */
  --paper-50: #F6F2E7;
  --paper-200: #E6DFCC;

  /* 印刷色 */
  --gold-500: #D4A017;
  --gold-700: #A87A0C;
  --teal-500: #3C8D8D;
  --teal-700: #2A6666;
  --red-500: #C0453A;

  /* 元信息 */
  --gray-600: #5A6273;
  --gray-400: #9AA3B5;

  /* 字体 */
  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: var(--font-display);
  --font-mono: "JetBrains Mono", "Source Han Mono", "Noto Sans Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 形状 */
  --radius-panel: 28px;
  --radius-card: 18px;
  --pill: 999px;

  /* 尺寸 */
  --header-h: 88px;
  --header-h-shrink: 64px;
  --status-h: 32px;
  --shell-max: 1440px;
  --content-max: 68ch;
  --seam: 6px;
  --pad-inline: clamp(20px, 4vw, 48px);

  /* 动效 */
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur-panel: 480ms;
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  margin: 0;
  background: var(--ink-900);
  color: var(--paper-50);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.t-display {
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.02em;
}

.t-heading {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.t-data,
code, kbd, samp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

.t-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gray-600);
}

/* ---------- 4. 焦点与可访问性 ---------- */
:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  padding: 12px 22px;
  background: var(--gold-500);
  color: var(--ink-950);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: 0 0 var(--radius-card) 0;
  transform: translateY(-120%);
  transition: transform 180ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  transition: background-color 240ms var(--ease);
}

/* 5.1 核对状态细条 */
.status-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--status-h);
  padding: 0 var(--pad-inline);
  background: var(--ink-950);
  border-bottom: 1px solid rgba(212, 160, 23, .28);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray-400);
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.status-strip::-webkit-scrollbar { display: none; }

.status-strip__dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-500);
}

.status-strip__sep { color: rgba(154, 163, 181, .45); flex: none; }

.status-strip__key { color: var(--gold-500); font-weight: 600; }

/* 5.2 品牌与导航横栏 */
.header-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 48px);
  min-height: var(--header-h);
  padding: 0 var(--pad-inline);
  background: rgba(15, 26, 46, .28);
  border-bottom: 1px solid rgba(246, 242, 231, .16);
  transition:
    min-height 240ms var(--ease),
    background-color 240ms var(--ease),
    border-color 240ms var(--ease);
}

.site-header[data-scrolled] .header-bar {
  background: var(--ink-900);
  border-bottom-color: rgba(212, 160, 23, .5);
  min-height: var(--header-h-shrink);
}

/* 5.3 字标 */
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
  flex: none;
  color: var(--paper-50);
}

.brand__word {
  position: relative;
  display: inline-block;
  padding-right: 10px;
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: .05em;
}

.brand__word::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 0;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--gold-500);
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--gray-400);
}

.brand--footer .brand__word { font-size: 30px; }

/* 5.4 主导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 28px);
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--paper-50);
  opacity: .84;
  transition: opacity 160ms var(--ease), color 160ms var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

.nav-list a:hover,
.nav-list a:focus-visible { opacity: 1; }

.nav-list a:hover::after,
.nav-list a:focus-visible::after { transform: scaleX(1); }

.nav-list a[aria-current="page"] {
  color: var(--gold-500);
  opacity: 1;
}

.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border: 1px solid var(--gold-500);
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gold-500);
  transition: background-color 200ms var(--ease), color 200ms var(--ease);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: var(--gold-500);
  color: var(--ink-950);
}

/* 5.5 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 16px;
  border: 1px solid rgba(246, 242, 231, .32);
  border-radius: var(--pill);
  color: var(--paper-50);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--paper-50);
  transition: transform 220ms var(--ease), background-color 220ms var(--ease);
}

.nav-toggle__bars { position: relative; }

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* 5.6 滚动进度线 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  transition: opacity 240ms var(--ease);
  pointer-events: none;
}

.site-header[data-scrolled] .scroll-progress { opacity: 1; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-950);
  color: var(--paper-50);
  border-top: 1px solid rgba(212, 160, 23, .45);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(246, 242, 231, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246, 242, 231, .05) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(40px, 5.5vw, 72px) var(--pad-inline) clamp(22px, 3vw, 34px);
}

.footer-brand {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(246, 242, 231, .14);
}

.footer-note {
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--gray-400);
}

.footer-nav { margin-top: 26px; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 860px;
}

.footer-links a {
  display: inline-block;
  padding: 7px 16px;
  border: 1px solid rgba(246, 242, 231, .22);
  border-radius: var(--pill);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--paper-50);
  transition:
    border-color 180ms var(--ease),
    color 180ms var(--ease),
    background-color 180ms var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  border-color: var(--gold-500);
  color: var(--gold-500);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(18px, 2.4vw, 32px);
  margin-top: 34px;
}

.footer-contact__item dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray-400);
}

.footer-contact__item dd {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-50);
  word-break: break-word;
}

.footer-contact__note {
  margin-top: 20px;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--gray-400);
}

.footer-signature {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 16px var(--pad-inline);
  border-top: 1px solid rgba(212, 160, 23, .4);
  border-bottom: 1px solid rgba(246, 242, 231, .1);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray-400);
}

.footer-signature b { color: var(--gold-500); font-weight: 600; }

.footer-legal {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 28px;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 18px var(--pad-inline) 34px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray-400);
}

.footer-legal__brand { color: var(--paper-50); }

/* ---------- 7. 通用容器与栅格 ---------- */
.shell {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-inline);
}

.shell--narrow { max-width: 980px; }

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ---------- 8. 堆叠面板与编号章节 ---------- */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--seam);
  background: var(--ink-900);
}

.panel {
  position: relative;
  background: var(--paper-50);
  color: var(--ink-900);
  border-radius: var(--radius-panel);
  padding: clamp(28px, 4vw, 56px);
}

.panel--dark {
  background: var(--ink-700);
  color: var(--paper-50);
}

.panel--cut {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 40px));
}

.panel--shift-l { margin-left: clamp(0px, 3vw, 48px); }
.panel--shift-r { margin-right: clamp(0px, 3vw, 48px); }

.section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px clamp(14px, 2vw, 26px);
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.section-number {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold-700);
}

.panel--dark .section-number { color: var(--gold-500); }

.section-title {
  display: inline-block;
  font-size: clamp(1.35rem, 2.6vw, 2.05rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin-top: 10px;
  background: var(--gold-500);
}

/* ---------- 9. 仪表读数块 ---------- */
.readout {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.readout__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--gold-500);
}

.panel .readout__value { color: var(--gold-700); }
.panel--dark .readout__value { color: var(--gold-500); }

.readout__unit {
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--gray-600);
}

.panel--dark .readout__unit { color: var(--gray-400); }

.readout__label {
  width: 100%;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--gray-600);
}

.panel--dark .readout__label { color: var(--gray-400); }

/* ---------- 10. 参数表 ---------- */
.data-table {
  width: 100%;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-card);
  overflow: hidden;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
}

.data-table caption {
  caption-side: top;
  padding: 0 0 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray-600);
}

.data-table th {
  padding: 11px 14px;
  background: var(--ink-700);
  color: var(--paper-50);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-align: left;
  white-space: nowrap;
}

.data-table td {
  padding: 11px 14px;
  color: var(--ink-900);
  border-top: 1px solid var(--paper-200);
  vertical-align: top;
}

.data-table tbody tr:nth-child(even) td { background: var(--paper-200); }

.data-table td .unit { color: var(--gold-700); }

/* ---------- 11. 胶囊标签 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 13px;
  border: 1px solid currentColor;
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  line-height: 1.6;
  white-space: nowrap;
}

.pill--home { color: var(--gold-700); }
.pill--commercial { color: var(--teal-700); }
.pill--universal { color: var(--ink-400); }

.pill--on-ink.pill--home { color: var(--gold-500); }
.pill--on-ink.pill--commercial { color: var(--teal-500); }
.pill--on-ink.pill--universal { color: var(--ink-400); }

/* ---------- 12. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.4;
  transition:
    background-color 200ms var(--ease),
    color 200ms var(--ease),
    border-color 200ms var(--ease);
}

.btn--gold {
  background: var(--gold-500);
  color: var(--ink-950);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background: var(--ink-900);
  color: var(--gold-500);
  border-color: var(--gold-500);
}

.btn--ghost {
  border-color: var(--ink-700);
  color: var(--ink-900);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--gold-700);
  color: var(--gold-700);
}

.btn--on-ink {
  border-color: var(--gold-500);
  color: var(--gold-500);
}

.btn--on-ink:hover,
.btn--on-ink:focus-visible {
  background: var(--gold-500);
  color: var(--ink-950);
}

/* ---------- 13. 图片容器基础 ---------- */
.fig-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-panel);
  overflow: hidden;
  background: var(--ink-700);
  isolation: isolate;
}

.fig-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fig-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(246, 242, 231, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246, 242, 231, .12) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
}

.fig-frame[data-placeholder]::before {
  content: attr(data-placeholder);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-align: center;
  color: rgba(246, 242, 231, .55);
}

.fig-frame--tall { aspect-ratio: 3 / 4; }
.fig-frame--square { aspect-ratio: 1 / 1; }
.fig-frame--wide { aspect-ratio: 21 / 9; }

/* ---------- 14. 面包屑与正文容器 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray-400);
}

.breadcrumb a {
  color: var(--paper-50);
  opacity: .86;
  transition: color 160ms var(--ease), opacity 160ms var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--gold-500);
  opacity: 1;
}

.breadcrumb__sep { color: rgba(154, 163, 181, .5); }

.prose {
  max-width: var(--content-max);
  line-height: 1.85;
}

.prose > * + * { margin-top: 1.2em; }
.prose h2 { margin-top: 3.2em; }
.prose h3 { margin-top: 2.4em; }

.prose ul,
.prose ol {
  padding-left: 1.4em;
  list-style: disc;
}

.prose ol { list-style: decimal; }
.prose li + li { margin-top: .4em; }

/* ---------- 15. 入场动效协议 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--dur-panel) var(--ease),
    transform var(--dur-panel) var(--ease);
}

.has-js [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1280px) {
  .panel--shift-l,
  .panel--shift-r { margin-left: 0; margin-right: 0; }
}

@media (max-width: 1024px) {
  :root { --header-h: 76px; --header-h-shrink: 60px; }

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

@media (max-width: 860px) {
  body { font-size: 16px; }

  .brand__tagline { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 10px var(--pad-inline) 26px;
    background: var(--ink-950);
    border-top: 1px solid rgba(212, 160, 23, .45);
    max-height: calc(100vh - var(--header-h) - var(--status-h));
    overflow-y: auto;
  }

  .site-nav[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list a {
    padding: 15px 2px;
    font-size: 17px;
    border-bottom: 1px solid rgba(246, 242, 231, .1);
    opacity: 1;
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] {
    padding-left: 14px;
    box-shadow: inset 3px 0 0 var(--gold-500);
  }

  .nav-cta {
    justify-content: center;
    width: 100%;
    margin-top: 22px;
    padding: 14px 22px;
  }

  .grid--2,
  .grid--3,
  .grid--auto,
  .grid--12 { grid-template-columns: minmax(0, 1fr); }

  .span-4, .span-6, .span-8, .span-12 { grid-column: span 1; }

  .panel { border-radius: 22px; }
  .fig-frame { border-radius: 22px; }

  .data-table,
  .data-table thead,
  .data-table tbody,
  .data-table tr,
  .data-table th,
  .data-table td { display: block; }

  .data-table thead { display: none; }

  .data-table tr {
    padding: 12px 0;
    border-top: 1px solid var(--paper-200);
  }

  .data-table td {
    padding: 4px 14px;
    border-top: 0;
    background: transparent !important;
  }

  .data-table td::before {
    content: attr(data-key);
    display: block;
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--gray-600);
  }

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

@media (max-width: 520px) {
  .status-strip { font-size: 11px; }
  .brand__word { font-size: 22px; }
  .nav-toggle__label { display: none; }
  .footer-links a { padding: 7px 13px; font-size: 12px; }
}

/* ---------- 17. 降级：减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
    transition-property: opacity, background-color, color, border-color !important;
  }

  .has-js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .scroll-progress { transition: none; }
}