/* ==========================================================================
   老版本棋牌 · 3368 官方中文站 — 共享样式表 /assets/site.css
   1 重置 · 2 变量 · 3 中文排版 · 4 栅格与容器 · 5 通用组件
   6 头部 · 7 页脚 · 8 动效 · 9 响应式
   ========================================================================== */

/* 1 · 重置 ---------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h, 72px) + 18px);
}

body {
  margin: 0;
  background: var(--ivory-100);
  color: var(--charcoal);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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; }
main { display: block; }

/* 2 · 变量 ---------------------------------------------------------------- */
:root {
  --ink: #0B1F19;
  --felt-700: #14483A;
  --felt-500: #1F6B54;
  --gold-500: #C9A227;
  --gold-200: #EBD9A0;
  --ivory-100: #F5F1E6;
  --ivory-50: #FBF8F1;
  --charcoal: #23282A;
  --mist: #DCE7E1;
  --wine: #6B2233;
  --slate: #5C6B66;

  --line: rgba(11, 31, 25, 0.14);
  --line-strong: rgba(11, 31, 25, 0.26);
  --line-light: rgba(245, 241, 230, 0.18);

  --shadow-soft: 0 2px 12px rgba(11, 31, 25, 0.06);
  --shadow-lift: 0 18px 44px rgba(11, 31, 25, 0.18);

  --header-h: 74px;
  --dock-h: 62px;
  --maxw: 1200px;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Inter, system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, "Courier New", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* 3 · 中文排版 ------------------------------------------------------------ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 { font-size: clamp(34px, 5.4vw, 60px); line-height: 1.1; }
h2 { font-size: clamp(26px, 3.6vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 26px); }

p { text-wrap: pretty; }

.num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.rule-gold {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--gold-500), rgba(201, 162, 39, 0));
}

/* 4 · 容器与栅格 ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 5vw, 48px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

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

.offset-header {
  padding-top: calc(var(--header-h) + clamp(32px, 5vw, 72px));
}

/* 5 · 通用组件 ------------------------------------------------------------ */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold-500);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

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

.plate {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate);
  margin-bottom: 18px;
}

.plate-index {
  color: var(--gold-500);
  font-weight: 600;
}

.plate::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--line);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.section-lede {
  max-width: 34em;
  margin-top: 14px;
  font-size: 17px;
  color: var(--slate);
}

.prose {
  max-width: 38em;
  font-size: 17px;
  line-height: 1.78;
  color: var(--charcoal);
}

.prose p + p { margin-top: 1.05em; }

.prose h2 {
  margin: 2.1em 0 0.65em;
  font-size: clamp(24px, 3vw, 32px);
}

.prose h3 {
  margin: 1.7em 0 0.5em;
  font-family: var(--font-body);
  font-size: 19px;
  font-weight: 700;
  color: var(--felt-700);
}

.prose ul,
.prose ol { margin: 1em 0; }

.prose li {
  position: relative;
  padding-left: 20px;
  margin: 0.5em 0;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--gold-500);
}

.prose a {
  color: var(--felt-700);
  border-bottom: 1px solid var(--gold-500);
}

.prose a:hover { color: var(--ink); }

.prose strong { color: var(--ink); font-weight: 700; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 24px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.btn--primary {
  background: var(--felt-700);
  border-color: var(--felt-700);
  color: var(--ivory-100);
}

.btn--primary:hover {
  background: var(--felt-500);
  border-color: var(--felt-500);
}

.btn--gold {
  background: var(--gold-500);
  border-color: var(--gold-500);
  color: #1A1204;
}

.btn--gold:hover {
  background: var(--gold-200);
  border-color: var(--gold-200);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--gold-500);
  color: var(--felt-700);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--felt-700);
  background: var(--ivory-50);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.tag--gold {
  color: #6F560C;
  background: rgba(235, 217, 160, 0.28);
  border-color: rgba(201, 162, 39, 0.55);
}

.tag--wine {
  color: var(--wine);
  background: rgba(107, 34, 51, 0.06);
  border-color: rgba(107, 34, 51, 0.38);
}

.panel {
  background: var(--ivory-50);
  border: 1px solid var(--line);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
  padding: clamp(20px, 3vw, 32px);
}

.panel--ink {
  background: var(--ink);
  border-color: rgba(201, 162, 39, 0.3);
  color: rgba(245, 241, 230, 0.84);
}

.panel--ink h2,
.panel--ink h3 { color: var(--ivory-100); }

.panel--felt {
  background: var(--felt-700);
  border-color: rgba(201, 162, 39, 0.28);
  color: rgba(245, 241, 230, 0.9);
}

.panel--felt h2,
.panel--felt h3 { color: var(--ivory-100); }

.breadcrumbs { font-size: 13px; color: var(--slate); }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "·";
  color: var(--gold-500);
}

.breadcrumb-link { transition: color 0.18s var(--ease); }
.breadcrumb-link:hover { color: var(--felt-700); }

.breadcrumb-current {
  color: var(--ink);
  font-weight: 600;
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--felt-700);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.92) contrast(1.02);
}

.media-frame--wide { aspect-ratio: 16 / 7; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.media-caption::before {
  content: "";
  flex: 0 0 24px;
  height: 1px;
  background: var(--gold-500);
  transform: translateY(-4px);
}

.toc { font-size: 14px; }

.toc-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
  margin-bottom: 12px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--line);
}

.toc-link {
  display: block;
  margin-left: -1px;
  padding: 6px 0 6px 14px;
  color: var(--slate);
  border-left: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.toc-link:hover { color: var(--felt-700); }

.toc-link[aria-current="true"] {
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--gold-500);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 130;
  pointer-events: none;
  background: transparent;
}

.scroll-progress-bar {
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold-500), var(--gold-200));
}

.back-to-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(14px, 3vw, 30px);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-200);
  background: rgba(11, 31, 25, 0.94);
  border: 1px solid rgba(201, 162, 39, 0.42);
  border-radius: 2px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease),
    visibility 0.24s linear, border-color 0.2s var(--ease);
}

.back-to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover { border-color: var(--gold-500); }

/* 6 · 头部 ---------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  color: var(--ivory-100);
  background: linear-gradient(
    180deg,
    rgba(11, 31, 25, 0.94) 0%,
    rgba(11, 31, 25, 0.6) 58%,
    rgba(11, 31, 25, 0) 100%
  );
  border-bottom: 1px solid transparent;
  transition: background-color 0.24s ease-out, background-image 0.24s ease-out,
    border-color 0.24s ease-out, box-shadow 0.24s ease-out;
}

.site-header[data-scrolled="true"] {
  background: var(--ink);
  background-image: none;
  border-bottom-color: rgba(201, 162, 39, 0.34);
  box-shadow: 0 12px 32px rgba(11, 31, 25, 0.24);
}

.header-inner {
  width: 100%;
  max-width: var(--maxw);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 44px);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 34px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding: 10px 0;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--gold-500);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px rgba(201, 162, 39, 0.16);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--gold-500);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--ivory-100);
}

.brand-note {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--gold-200);
}

.site-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.5vw, 26px);
}

.nav-item { flex: 0 0 auto; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: rgba(245, 241, 230, 0.82);
  transition: color 0.18s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 1px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease);
}

.nav-link:hover { color: var(--ivory-100); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--gold-200); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.header-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 15px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ivory-100);
  border: 1px solid rgba(235, 217, 160, 0.42);
  border-radius: 2px;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease);
}

.header-action:hover {
  background: rgba(201, 162, 39, 0.14);
  border-color: var(--gold-500);
}

.header-action--primary {
  background: var(--gold-500);
  border-color: var(--gold-500);
  color: #1A1204;
}

.header-action--primary:hover {
  background: var(--gold-200);
  border-color: var(--gold-200);
  color: #1A1204;
}

.nav-toggle { display: none; }

.nav-toggle-lines {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
}

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.16s linear;
}

.nav-toggle-text {
  font-family: var(--font-mono);
  letter-spacing: 0.16em;
}

.quick-dock { display: none; }

/* 7 · 页脚 ---------------------------------------------------------------- */
.site-footer {
  background: var(--ink);
  color: rgba(245, 241, 230, 0.76);
  font-size: 15px;
  padding-top: clamp(52px, 7vw, 96px);
  border-top: 1px solid rgba(201, 162, 39, 0.24);
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 5vw, 48px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: clamp(30px, 4vw, 52px);
  border-bottom: 1px solid var(--line-light);
}

.footer-wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--ivory-100);
}

.footer-tagline {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold-500);
}

.footer-brand-note {
  margin-top: 18px;
  max-width: 22em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 241, 230, 0.58);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold-500);
}

.footer-links { display: flex; flex-direction: column; gap: 2px; }

.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 15px;
  color: rgba(245, 241, 230, 0.76);
  transition: color 0.18s var(--ease);
}

.footer-link::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 1px;
  margin-right: 0;
  vertical-align: 3px;
  background: var(--gold-500);
  transition: width 0.22s var(--ease), margin-right 0.22s var(--ease);
}

.footer-link:hover { color: var(--ivory-100); }

.footer-link:hover::before {
  width: 14px;
  margin-right: 8px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 40px;
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--line-light);
}

.footer-contact-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

.footer-contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold-500);
}

.footer-contact-val { color: rgba(245, 241, 230, 0.88); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 28px;
  padding: 22px 0 clamp(26px, 4vw, 40px);
  font-size: 13px;
  color: rgba(245, 241, 230, 0.5);
}

.footer-legal,
.footer-note { margin: 0; }

/* 8 · 动效 ---------------------------------------------------------------- */
[data-reveal] {
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

.reveal-ready [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
  border-radius: 2px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--gold-200);
}

#main-content { scroll-margin-top: calc(var(--header-h) + 16px); }

/* 9 · 响应式 -------------------------------------------------------------- */
@media (max-width: 1080px) {
  .brand-note { letter-spacing: 0.12em; }
  .header-action { padding: 0 12px; font-size: 13px; }
}

@media (max-width: 900px) {
  :root { --header-h: 62px; }

  .header-inner { gap: 12px; }
  .header-actions { display: none; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-left: auto;
    min-height: 40px;
    padding: 0 12px;
    color: var(--gold-200);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1;
    border: 1px solid rgba(235, 217, 160, 0.42);
    border-radius: 2px;
    cursor: pointer;
    transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
  }

  .nav-toggle:hover {
    border-color: var(--gold-500);
    background: rgba(201, 162, 39, 0.12);
  }

  .site-header[data-open="true"] .nav-toggle-line:nth-child(1) {
    transform: translateY(5.25px) rotate(45deg);
  }

  .site-header[data-open="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }

  .site-header[data-open="true"] .nav-toggle-line:nth-child(3) {
    transform: translateY(-5.25px) rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin-left: 0;
    display: none;
    max-height: calc(100dvh - var(--header-h) - var(--dock-h));
    overflow-y: auto;
    background: var(--ink);
    border-top: 1px solid rgba(201, 162, 39, 0.24);
    border-bottom: 1px solid rgba(201, 162, 39, 0.24);
    box-shadow: var(--shadow-lift);
  }

  .site-header[data-open="true"] {
    background: var(--ink);
    background-image: none;
    border-bottom-color: rgba(201, 162, 39, 0.34);
  }

  .site-header[data-open="true"] .site-nav { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px clamp(18px, 5vw, 32px) 20px;
  }

  .nav-link {
    display: block;
    padding: 15px 0;
    font-size: 17px;
    color: rgba(245, 241, 230, 0.86);
    border-bottom: 1px solid rgba(245, 241, 230, 0.12);
  }

  .nav-link::after { display: none; }

  .nav-item:last-child .nav-link { border-bottom: 0; }

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

  .quick-dock {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 110;
    display: flex;
    gap: 8px;
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
    background: rgba(11, 31, 25, 0.97);
    border-top: 1px solid rgba(201, 162, 39, 0.3);
  }

  .quick-dock-link {
    flex: 1 1 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    font-size: 15px;
    font-weight: 600;
    color: var(--ivory-100);
    border: 1px solid rgba(235, 217, 160, 0.42);
    border-radius: 2px;
  }

  .quick-dock-link--primary {
    background: var(--gold-500);
    border-color: var(--gold-500);
    color: #1A1204;
  }

  .site-footer { padding-bottom: calc(var(--dock-h) + 10px); }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .footer-grid { grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); }

  .back-to-top { bottom: calc(var(--dock-h) + 16px); }

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

  .toc {
    position: static;
    margin-bottom: 24px;
  }

  .toc-title { margin-bottom: 8px; }

  .toc-list {
    flex-direction: row;
    gap: 0;
    overflow-x: auto;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 6px;
  }

  .toc-link {
    flex: 0 0 auto;
    margin-left: 0;
    padding: 8px 14px;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 1px solid transparent;
  }

  .toc-link[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--gold-500);
  }
}

@media (max-width: 560px) {
  .brand-name { font-size: 18px; }
  .brand-note { font-size: 9px; letter-spacing: 0.1em; }
  .brand-mark { width: 24px; height: 24px; }
  .brand-mark::after { inset: 6px; }
  .footer-contact { gap: 8px 20px; }
  .footer-contact-item { font-size: 13px; }
  .section-lede { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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