/* =========================================================
   /assets/site.css — 优德赛场 共享外壳
   01 Reset · 02 Tokens · 03 Base · 04 Layout · 05 Buttons
   06 Components · 07 Header · 08 Footer · 09 Progress/Chapter
   10 Focus · 11 Responsive · 12 Reduced motion
   ========================================================= */

/* ---------- 01 Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dt, dd, figure, blockquote { margin: 0; }

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

img, picture, svg, video, canvas { 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%; }

/* ---------- 02 Tokens ---------- */
:root {
  --ink: #081426;
  --ink-deep: #050B14;
  --paper: #F3E9DA;
  --paper-white: #FFF9EF;
  --paper-line: #C9BBA5;
  --orange: #FF6A1A;
  --cyan: #2FE0D0;
  --steel: #7086A3;
  --green: #5BE49B;
  --red: #E5484D;

  --ink-rule: rgba(243, 233, 218, 0.18);
  --ink-rule-soft: rgba(243, 233, 218, 0.12);
  --ink-muted: rgba(243, 233, 218, 0.66);
  --paper-rule: rgba(8, 20, 38, 0.16);

  --shadow-hard: 7px 7px 0 var(--ink-deep);
  --shadow-soft: 4px 4px 0 var(--ink-deep);

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

  --page-max: 1440px;
  --gutter: clamp(16px, 4vw, 56px);
  --nav-h: 62px;
}

/* ---------- 03 Base ---------- */
body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(32px, 5.2vw, 68px); }
h2 { font-size: clamp(26px, 3.4vw, 44px); }
h3 { font-size: clamp(19px, 2vw, 26px); font-weight: 800; }
h4 { font-size: 18px; font-weight: 800; }

strong, b { font-weight: 700; }

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

:target { scroll-margin-top: calc(var(--nav-h) + 24px); }

/* ---------- 04 Layout ---------- */
.container {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  width: 100%;
  max-width: 880px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 88px); }
.section--paper { background-color: var(--paper); color: var(--ink); }
.section--ink { background-color: var(--ink); color: var(--paper-white); }

.section-head {
  display: grid;
  gap: 10px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 3vw, 36px);
  border-bottom: 2px solid var(--paper-line);
}

.section--ink .section-head { border-bottom-color: var(--ink-rule); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background-color: currentColor;
  flex: none;
}

.section-index {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.section-title { font-size: clamp(24px, 3.2vw, 40px); font-weight: 900; }

.section-lede {
  font-size: 16px;
  line-height: 1.7;
  color: var(--steel);
  max-width: 64ch;
}

.section--ink .section-lede { color: var(--ink-muted); }

.prose { font-size: 17px; line-height: 1.8; }
.prose p { max-width: 72ch; }
.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; }
.prose ul, .prose ol { display: grid; gap: 0.4em; margin-block: 1em; padding-left: 1.2em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose a { color: var(--ink); border-bottom: 2px solid var(--orange); }
.prose a:hover { color: var(--orange); }

.grid { display: grid; gap: clamp(16px, 2.2vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--aside { grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); align-items: start; }

/* ---------- 05 Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--ink);
  background-color: var(--paper-white);
  border: 2px solid var(--ink-deep);
  box-shadow: var(--shadow-soft);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.btn:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard); }
.btn:active { transform: translate(0, 0); box-shadow: 2px 2px 0 var(--ink-deep); }

.btn--primary { background-color: var(--orange); color: var(--ink-deep); }
.btn--primary:hover { background-color: #ff7d38; }

.btn--cyan { background-color: var(--cyan); color: var(--ink-deep); }

.btn--ghost {
  background-color: transparent;
  color: var(--paper-white);
  border-color: var(--paper-line);
  box-shadow: 4px 4px 0 rgba(5, 11, 20, 0.7);
}

.btn--ghost:hover { background-color: rgba(243, 233, 218, 0.08); }

.btn--sm { padding: 8px 14px; font-size: 13px; box-shadow: 3px 3px 0 var(--ink-deep); }

/* ---------- 06 Components ---------- */
.panel {
  background-color: var(--paper-white);
  color: var(--ink);
  border: 2px solid var(--ink-deep);
  box-shadow: var(--shadow-soft);
  padding: clamp(16px, 2.2vw, 26px);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.panel--ink {
  background-color: var(--ink);
  color: var(--paper-white);
  border-color: var(--ink-deep);
  box-shadow: 6px 6px 0 rgba(201, 187, 165, 0.4);
}

.panel--hover:hover { transform: translate(-3px, -3px); box-shadow: var(--shadow-hard); }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  background-color: var(--paper-white);
  border: 2px solid var(--ink-deep);
  box-shadow: 3px 3px 0 var(--ink-deep);
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.chip:hover { background-color: var(--cyan); color: var(--ink-deep); transform: translate(-1px, -1px); }

.chip[aria-pressed="true"],
.chip.is-active { background-color: var(--orange); color: var(--ink-deep); }

.tag {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
  border: 1px solid currentColor;
}

.tag--cyan { color: var(--cyan); }
.tag--green { color: var(--green); }
.tag--muted { color: var(--steel); }

.stat { display: grid; gap: 2px; }

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.data-table {
  width: 100%;
  font-size: 15px;
  background-color: var(--paper-white);
  border: 2px solid var(--ink-deep);
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--paper-line);
}

.data-table thead th {
  background-color: var(--ink);
  color: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--ink-deep);
}

.data-table tbody tr:hover { background-color: rgba(47, 224, 208, 0.12); }

.data-table .is-num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--ink);
  background-image: repeating-linear-gradient(135deg, rgba(243, 233, 218, 0.09) 0 2px, transparent 2px 14px);
  border: 2px solid var(--ink-deep);
  box-shadow: var(--shadow-soft);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(47, 224, 208, 0.2), transparent 52%, rgba(255, 106, 26, 0.24));
  pointer-events: none;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.breadcrumb { padding-block: 14px 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.breadcrumb-item { display: inline-flex; align-items: center; gap: 10px; }

.breadcrumb-item + .breadcrumb-item::before {
  content: "›";
  font-size: 15px;
  line-height: 1;
  color: var(--paper-line);
}

.breadcrumb-link {
  color: var(--ink);
  padding-bottom: 1px;
  border-bottom: 1px solid var(--paper-line);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.breadcrumb-link:hover,
.breadcrumb-link:focus-visible { color: var(--orange); border-bottom-color: var(--orange); }

.breadcrumb-item[aria-current="page"] { color: var(--ink); font-weight: 600; }

/* ---------- 07 Header ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  font-weight: 700;
  font-size: 14px;
  color: var(--ink-deep);
  background-color: var(--cyan);
  border: 2px solid var(--ink-deep);
  box-shadow: var(--shadow-soft);
  transition: top 0.18s ease;
}

.skip-link:focus { top: 12px; }

.site-header {
  position: relative;
  z-index: 60;
  color: var(--paper-white);
  background-color: var(--ink);
  background-image:
    linear-gradient(90deg, rgba(47, 224, 208, 0.07) 1px, transparent 1px),
    linear-gradient(180deg, rgba(243, 233, 218, 0.05) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  border-bottom: 3px solid var(--ink-deep);
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  background-color: rgba(5, 11, 20, 0.5);
  pointer-events: none;
}

.read-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.1s linear;
  will-change: transform;
}

.masthead-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding: 16px var(--gutter) 12px;
}

.masthead-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.masthead-meta--left { justify-self: start; }

.masthead-edition {
  display: inline-block;
  padding: 2px 6px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-deep);
  background-color: var(--orange);
}

.brand {
  display: inline-grid;
  justify-items: center;
  gap: 5px;
  padding: 2px 10px;
  text-align: center;
}

.brand-mark {
  position: relative;
  display: block;
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.14em;
  text-indent: 0.14em;
  color: var(--paper-white);
  transition: color 0.18s ease;
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 4px;
  background: linear-gradient(90deg, var(--orange) 0 50%, var(--cyan) 50% 100%);
}

.brand-tagline {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(243, 233, 218, 0.66);
}

.brand:hover .brand-mark { color: var(--cyan); }

.masthead-utility {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(10px, 2vw, 22px);
  justify-self: end;
}

.utility-link {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(47, 224, 208, 0.35);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.utility-link:hover,
.utility-link:focus-visible { color: var(--orange); border-bottom-color: var(--orange); }

.masthead-nav {
  position: sticky;
  top: 0;
  z-index: 70;
  background-color: var(--ink);
  border-top: 1px solid var(--ink-rule);
  border-bottom: 1px solid var(--ink-rule-soft);
}

.masthead-nav-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: var(--page-max);
  min-height: var(--nav-h);
  margin-inline: auto;
  padding: 0 var(--gutter);
}

.nav-toggle {
  grid-column: 1;
  justify-self: start;
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  color: var(--paper-white);
  background-color: transparent;
  border: 2px solid rgba(243, 233, 218, 0.4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.nav-toggle:hover { color: var(--cyan); border-color: var(--cyan); }

.nav-toggle[aria-expanded="true"] {
  color: var(--ink-deep);
  background-color: var(--orange);
  border-color: var(--orange);
}

.nav-toggle-bars { display: grid; gap: 3px; width: 16px; flex: none; }

.nav-toggle-bars > span {
  display: block;
  height: 2px;
  background-color: currentColor;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars > span:nth-child(1) { transform: translateY(5px) 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(-5px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

.site-nav { grid-column: 2; justify-self: center; position: relative; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 26px);
}

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--paper);
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--steel);
  transition: color 0.15s ease;
}

.nav-text { line-height: 1.1; }

.nav-link:hover,
.nav-link:focus-visible { color: var(--cyan); border-bottom-color: var(--cyan); }
.nav-link:hover .nav-index,
.nav-link:focus-visible .nav-index { color: var(--cyan); }

.nav-link[aria-current="page"] { color: var(--orange); border-bottom-color: var(--orange); }
.nav-link[aria-current="page"] .nav-index { color: var(--orange); }

.header-cta { grid-column: 3; justify-self: end; white-space: nowrap; }

/* ---------- 08 Footer ---------- */
.site-footer {
  position: relative;
  color: var(--paper);
  background-color: var(--ink);
  background-image: repeating-linear-gradient(135deg, rgba(243, 233, 218, 0.045) 0 2px, transparent 2px 16px);
  border-top: 3px solid var(--ink-deep);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--orange) 0 34%, var(--cyan) 34% 62%, var(--paper-line) 62% 100%);
}

.footer-inner {
  position: relative;
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding: clamp(34px, 5vw, 64px) var(--gutter) clamp(20px, 3vw, 28px);
}

.footer-masthead { display: grid; gap: 8px; max-width: 70ch; }

.footer-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-brand {
  font-size: clamp(22px, 3.2vw, 38px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--paper-white);
}

.footer-note {
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(20px, 3vw, 44px);
  margin-top: clamp(24px, 3.5vw, 40px);
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 2px solid var(--ink-rule);
}

.footer-group { display: grid; gap: 12px; align-content: start; }

.footer-group-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.footer-list { display: grid; gap: 8px; }

.footer-link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 2px 0;
  font-size: 15px;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-link:hover,
.footer-link:focus-visible { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-link-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(243, 233, 218, 0.5);
}

.footer-contact { display: grid; gap: 12px; align-content: start; }

.contact-list { display: grid; gap: 10px; }

.contact-item {
  display: grid;
  gap: 1px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--ink-rule);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(243, 233, 218, 0.55);
}

.contact-value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper-white);
  font-variant-numeric: tabular-nums;
  overflow-wrap: break-word;
}

.contact-note {
  max-width: 52ch;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(243, 233, 218, 0.6);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(24px, 3.5vw, 40px);
  padding-top: 16px;
  border-top: 2px solid var(--ink-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(243, 233, 218, 0.62);
}

.footer-icp { letter-spacing: 0.08em; }
.footer-copy { letter-spacing: 0.06em; }

/* ---------- 09 Chapter ---------- */
[data-chapter] { scroll-margin-top: calc(var(--nav-h) + 20px); }

.chapter-marker {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--steel);
  transition: color 0.2s ease;
}

[data-chapter][data-chapter-active] .chapter-marker { color: var(--orange); }

/* ---------- 10 Focus ---------- */
:focus-visible {
  outline: 3px solid var(--ink-deep);
  outline-offset: 3px;
}

.site-header :focus-visible,
.site-footer :focus-visible,
.section--ink :focus-visible,
.panel--ink :focus-visible {
  outline-color: var(--cyan);
}

/* ---------- 11 Responsive ---------- */
@media (max-width: 1100px) {
  .nav-link { font-size: 13px; }
  .nav-index { display: none; }
}

@media (max-width: 900px) {
  .masthead-top {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 8px;
    padding-bottom: 16px;
    text-align: center;
  }

  .brand { order: 1; }
  .masthead-meta--left { order: 2; justify-self: center; }
  .masthead-utility { order: 3; justify-self: center; justify-content: center; }

  .masthead-nav-inner {
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    min-height: 58px;
  }

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

  .site-nav {
    grid-column: 1 / -1;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    justify-self: stretch;
    display: none;
    padding: 10px var(--gutter) 20px;
    background-color: var(--ink);
    border-bottom: 3px solid var(--orange);
    box-shadow: 0 16px 0 rgba(5, 11, 20, 0.25);
    max-height: calc(100vh - 58px);
    overflow-y: auto;
  }

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

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

  .nav-item + .nav-item { border-top: 1px solid var(--ink-rule); }

  .nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 2px;
    font-size: 16px;
    border-bottom: 0;
  }

  .nav-index {
    order: 2;
    display: inline-block;
    font-size: 12px;
    color: var(--steel);
  }

  .nav-link[aria-current="page"] { color: var(--orange); }
  .nav-link[aria-current="page"] .nav-index { color: var(--orange); }

  .header-cta { grid-column: 3; font-size: 12px; padding: 8px 10px; }

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

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

  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }

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

  .brand-mark { letter-spacing: 0.1em; text-indent: 0.1em; }

  .brand-tagline { font-size: 10px; letter-spacing: 0.12em; }

  .masthead-meta { font-size: 10px; letter-spacing: 0.12em; }

  .media-frame,
  .media-frame--wide { aspect-ratio: 16 / 11; }
}

/* ---------- 12 Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover,
  .panel--hover:hover,
  .chip:hover { transform: none; }

  .read-progress-bar { transition: none; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}