:root {
  --ink-950: #04080d;
  --ink-900: #081521;
  --ink-800: #0f2438;
  --ink-700: #183a57;
  --gold: #c9a227;
  --gold-light: #e8c766;
  --red: #a63a2b;
  --jade: #5e8c86;
  --ivory: #f3ebdd;
  --mist: #a9b4c0;
  --line: rgba(201, 162, 39, 0.28);
  --line-strong: rgba(201, 162, 39, 0.48);
  --surface: rgba(15, 36, 56, 0.72);
  --surface-deep: rgba(4, 8, 13, 0.72);
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "Sarasa Mono SC", "SFMono-Regular", Consolas, monospace;
  --max: 1240px;
  --gutter: clamp(18px, 4vw, 40px);
  --header-h: 82px;
  --radius-xl: 34px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.26);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  margin: 0;
  min-width: 320px;
  padding-top: clamp(90px, 7vw, 112px);
  overflow-x: hidden;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(circle at 50% -8%, rgba(201, 162, 39, 0.18), transparent 38rem),
    radial-gradient(circle at 82% 12%, rgba(166, 58, 43, 0.09), transparent 24rem),
    radial-gradient(circle at 16% 26%, rgba(94, 140, 134, 0.07), transparent 26rem),
    linear-gradient(90deg, rgba(201, 162, 39, 0.035) 1px, transparent 1px);
  background-size: auto, auto, auto, 120px 100%;
  color: var(--ivory);
  font-family: var(--font-sans);
  font-size: clamp(15px, 0.95rem + 0.14vw, 17px);
  line-height: 1.85;
  text-rendering: optimizeLegibility;
}

body::before,
body::after {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  z-index: 80;
  width: 1px;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--line) 12%, var(--line) 88%, transparent);
}

body::before {
  left: clamp(12px, 2.4vw, 32px);
}

body::after {
  right: clamp(12px, 2.4vw, 32px);
}

main {
  display: block;
}

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

h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
dl,
figure,
blockquote {
  margin-top: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: 0.7em;
  color: var(--ivory);
  font-family: var(--font-serif);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.025em;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
}

p {
  margin-bottom: 1em;
}

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

a {
  color: var(--gold-light);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

a:hover {
  color: var(--ivory);
}

button {
  cursor: pointer;
  font: inherit;
  color: inherit;
}

button:disabled {
  cursor: not-allowed;
}

:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 4px;
}

::selection {
  background: var(--gold);
  color: var(--ink-950);
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 0.7rem 1rem;
  border: 1px solid var(--gold-light);
  border-radius: var(--radius-pill);
  background: var(--ink-950);
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform 180ms var(--ease);
}

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

.content-shell {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reading-column {
  width: 100%;
  max-width: 72ch;
  margin-inline: auto;
}

.prose {
  color: var(--ivory);
  line-height: 1.9;
}

.prose p {
  max-width: 38em;
}

.prose p + p {
  margin-top: 1.15em;
}

.prose h2,
.prose h3 {
  margin-top: 1.8em;
}

.prose a {
  color: var(--gold-light);
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 0.75em;
  margin-bottom: 1rem;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-kicker::before {
  content: "";
  display: block;
  width: 2.4rem;
  height: 1px;
  background: var(--gold);
}

.section-title {
  position: relative;
  max-width: 12em;
  margin-bottom: 1rem;
  color: var(--ivory);
  text-shadow: 0 1px 0 rgba(201, 162, 39, 0.28);
}

.section-title::after {
  content: "";
  display: block;
  width: 3.6rem;
  height: 1px;
  margin-top: 0.8rem;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.section-lead {
  max-width: 40em;
  color: var(--mist);
  font-size: clamp(0.98rem, 1.2vw, 1.08rem);
}

.rule {
  width: 100%;
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.gateway-frame {
  position: relative;
  isolation: isolate;
  overflow: clip;
  padding: clamp(22px, 4.8vw, 56px);
  border: 1px solid var(--line);
  border-radius: clamp(26px, 10vw, 180px) clamp(26px, 10vw, 180px) var(--radius-lg) var(--radius-lg);
  background:
    radial-gradient(circle at 50% 0%, rgba(201, 162, 39, 0.12), transparent 48%),
    linear-gradient(180deg, rgba(15, 36, 56, 0.86), rgba(8, 21, 33, 0.92));
  box-shadow: var(--shadow);
}

.gateway-frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  z-index: -1;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: inherit;
  pointer-events: none;
}

.grid-2,
.grid-3 {
  display: grid;
  gap: clamp(16px, 2.8vw, 28px);
}

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

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

.panel {
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(15, 36, 56, 0.92), rgba(8, 21, 33, 0.92));
  box-shadow: var(--shadow);
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(4, 8, 13, 0.52);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.status-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.6rem 0.9rem;
  border-right: 1px solid var(--line);
}

.status-strip__item:last-child {
  border-right: 0;
}

.status-strip__item::before {
  content: "";
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px rgba(232, 199, 102, 0.58);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 0.75rem 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.button--gold {
  border-color: var(--gold-light);
  background: var(--gold);
  color: var(--ink-950);
}

.button--gold:hover {
  background: var(--gold-light);
  color: var(--ink-950);
  transform: translateY(-1px);
}

.button--ghost {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--gold-light);
}

.button--ghost:hover {
  border-color: var(--gold-light);
  background: rgba(201, 162, 39, 0.12);
  color: var(--ivory);
}

.button--text {
  min-height: auto;
  padding: 0.25rem 0;
  border-radius: 0;
  border-bottom: 1px solid var(--line-strong);
  color: var(--gold-light);
}

.breadcrumbs {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--gold);
  opacity: 0.62;
}

.breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
}

.breadcrumbs__link:hover {
  color: var(--gold-light);
}

.breadcrumbs__current {
  color: var(--gold-light);
}

.media-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--ink-700), var(--ink-900));
  box-shadow: var(--shadow);
}

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

.media-frame__caption {
  position: absolute;
  right: 0.8rem;
  bottom: 0.8rem;
  left: 0.8rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid rgba(201, 162, 39, 0.24);
  border-radius: var(--radius-pill);
  background: rgba(4, 8, 13, 0.7);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  backdrop-filter: blur(8px);
}

.media-frame--door {
  aspect-ratio: 3 / 4;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.36rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  line-height: 1.2;
}

.tag--gold {
  border-color: rgba(201, 162, 39, 0.52);
  background: rgba(201, 162, 39, 0.12);
  color: var(--gold-light);
}

.tag--jade {
  border-color: rgba(94, 140, 134, 0.58);
  background: rgba(94, 140, 134, 0.12);
  color: #9ec3bd;
}

.tag--red {
  border-color: rgba(166, 58, 43, 0.64);
  background: rgba(166, 58, 43, 0.12);
  color: #e2a29a;
}

.timeline {
  position: relative;
  display: grid;
  gap: 0;
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: clamp(14px, 2.5vw, 26px);
  padding: 1.1rem 0 1.1rem 1.4rem;
  border-left: 1px solid var(--line);
}

.timeline__marker {
  position: absolute;
  top: 1.55rem;
  left: -0.34rem;
  width: 0.62rem;
  height: 0.62rem;
  border: 1px solid var(--gold-light);
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.1);
}

.timeline__time {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.timeline__body {
  color: var(--mist);
}

.accordion {
  border-top: 1px solid var(--line);
}

.accordion__item {
  border-bottom: 1px solid var(--line);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 0;
  border: 0;
  background: transparent;
  color: var(--ivory);
  text-align: left;
}

.accordion__trigger:hover {
  color: var(--gold-light);
}

.accordion__panel {
  display: none;
  padding: 0 0 1rem;
  color: var(--mist);
}

.accordion__item.is-open .accordion__panel {
  display: block;
}

.index-list {
  border-top: 1px solid var(--line);
}

.index-list__item {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
}

.index-list__num {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.index-list__link {
  color: var(--ivory);
  text-decoration: none;
}

.index-list__link:hover {
  color: var(--gold-light);
}

.palace-header {
  --read-progress: 0;
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 500;
  isolation: isolate;
  border-bottom: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(4, 8, 13, 0.98) 0%, rgba(8, 21, 33, 0.94) 72%, rgba(8, 21, 33, 0.88) 100%);
  box-shadow: 0 1px 0 rgba(232, 199, 102, 0.12), 0 18px 48px rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(16px);
}

.read-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  z-index: 2;
  height: 2px;
  overflow: hidden;
  background: rgba(201, 162, 39, 0.14);
}

.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transform: scaleX(var(--read-progress, 0));
  transform-origin: left center;
  will-change: transform;
}

.palace-header__rail {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(16px, 2.4vw, 34px);
  width: min(100%, var(--max));
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ivory);
  text-decoration: none;
}

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

.brand-mark__seal {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--gold);
  border-radius: 50% 50% 46% 46% / 54% 54% 46% 46%;
  background:
    radial-gradient(circle at 36% 28%, rgba(232, 199, 102, 0.2), transparent 38%),
    linear-gradient(145deg, rgba(201, 162, 39, 0.18), rgba(166, 58, 43, 0.1));
  color: var(--gold-light);
  font-family: var(--font-serif);
  font-size: 1.42rem;
  font-weight: 900;
  line-height: 1;
  box-shadow: inset 0 0 0 4px rgba(4, 8, 13, 0.32), 0 0 24px rgba(201, 162, 39, 0.09);
}

.brand-mark__text {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  line-height: 1.1;
}

.brand-mark__name {
  color: var(--ivory);
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.brand-mark__sub {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.07em;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.47rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: rgba(201, 162, 39, 0.06);
  color: var(--gold);
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.version-badge:hover,
.version-badge[aria-expanded="true"] {
  border-color: var(--gold-light);
  background: rgba(201, 162, 39, 0.14);
  color: var(--gold-light);
}

.version-badge__label {
  color: var(--mist);
  font-family: var(--font-sans);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.version-badge__code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0.52rem 0.9rem;
  border: 1px solid var(--gold-light);
  border-radius: var(--radius-pill);
  background: var(--gold);
  color: var(--ink-950);
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(201, 162, 39, 0.12);
  transition: color 180ms var(--ease), background-color 180ms var(--ease), transform 180ms var(--ease);
}

.header-cta:hover {
  background: var(--gold-light);
  color: var(--ink-950);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  min-height: 38px;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--gold-light);
}

.nav-toggle__lines {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color 180ms var(--ease);
}

.nav-toggle__lines::before,
.nav-toggle__lines::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 180ms var(--ease);
}

.nav-toggle__lines::before {
  top: -6px;
}

.nav-toggle__lines::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__lines {
  background: transparent;
}

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

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

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.palace-nav {
  justify-self: center;
  min-width: 0;
}

.palace-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  counter-reset: palace-nav;
}

.palace-nav__item {
  display: block;
}

.palace-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.45rem 0.62rem;
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: 0.88rem;
  letter-spacing: 0.055em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.palace-nav__link::before {
  counter-increment: palace-nav;
  content: counter(palace-nav, decimal-leading-zero);
  margin-right: 0.42em;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  opacity: 0.78;
}

.palace-nav__link:hover {
  background: rgba(201, 162, 39, 0.09);
  color: var(--gold-light);
}

.palace-nav__link[aria-current="page"] {
  background: rgba(201, 162, 39, 0.14);
  color: var(--gold-light);
  box-shadow: inset 0 -2px 0 var(--gold);
}

.palace-nav__link[aria-current="page"]::before {
  color: var(--gold-light);
  opacity: 1;
}

.version-drawer {
  position: absolute;
  top: calc(100% + 8px);
  right: var(--gutter);
  z-index: 12;
  width: min(360px, calc(100vw - 32px));
}

.version-drawer__inner {
  position: relative;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line-strong);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(24, 58, 87, 0.96), rgba(8, 21, 33, 0.98));
  box-shadow: var(--shadow);
}

.version-drawer__inner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 1.2rem;
  left: 1.2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-light), transparent);
}

.version-drawer__kicker {
  margin-bottom: 0.55rem;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.version-drawer__text {
  margin-bottom: 0.8rem;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.7;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.text-link:hover {
  color: var(--ivory);
  border-bottom-color: var(--gold-light);
}

[data-chapter-link][aria-current="location"] {
  color: var(--gold-light);
  box-shadow: inset 0 -2px 0 var(--gold);
}

.palace-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 120px);
  border-top: 1px solid var(--line-strong);
  background:
    radial-gradient(circle at 50% 0%, rgba(201, 162, 39, 0.08), transparent 36rem),
    linear-gradient(180deg, var(--ink-900), var(--ink-950));
  color: var(--mist);
}

.palace-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  width: min(460px, 72vw);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-light), transparent);
  transform: translateX(-50%);
}

.palace-footer__frame {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding: clamp(42px, 7vw, 72px) var(--gutter) 24px;
}

.footer-brand {
  max-width: 54rem;
  padding-bottom: clamp(24px, 4vw, 36px);
  border-bottom: 1px solid var(--line);
}

.footer-brand__name {
  margin-bottom: 0.25rem;
  color: var(--gold-light);
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  font-weight: 900;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-shadow: 0 1px 0 rgba(201, 162, 39, 0.26);
}

.footer-brand__line {
  margin-bottom: 0.8rem;
  color: var(--ivory);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.footer-brand__address,
.footer-brand__note {
  max-width: 52em;
  margin-bottom: 0.35rem;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-brand__note {
  color: rgba(169, 180, 192, 0.82);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3.2vw, 38px);
  padding: clamp(26px, 4vw, 40px) 0;
}

.footer-column {
  min-width: 0;
}

.footer-column__title {
  margin-bottom: 0.8rem;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.footer-column__list {
  display: grid;
  gap: 0.55rem;
}

.footer-column__item {
  min-width: 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.65;
}

.footer-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.footer-link:hover {
  color: var(--gold-light);
  border-bottom-color: var(--line-strong);
}

.footer-column__text {
  color: var(--mist);
  overflow-wrap: anywhere;
}

.footer-column__code {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.78em;
  letter-spacing: 0.06em;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: rgba(169, 180, 192, 0.74);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.footer-bottom__copy,
.footer-bottom__meta {
  margin: 0;
}

.footer-bottom__meta {
  color: rgba(201, 162, 39, 0.74);
}

@media (max-width: 1100px) {
  .palace-nav__link {
    padding-inline: 0.5rem;
    font-size: 0.84rem;
  }

  .palace-nav__link::before {
    font-size: 0.6rem;
  }
}

@media (max-width: 980px) {
  :root {
    --header-h: 74px;
  }

  body {
    padding-top: 84px;
  }

  .palace-nav {
    display: none;
  }

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

  .palace-header[data-open] .palace-nav {
    position: absolute;
    top: 100%;
    right: var(--gutter);
    left: var(--gutter);
    display: block;
    margin-top: 8px;
    padding: 12px;
    border: 1px solid var(--line-strong);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    background: linear-gradient(180deg, rgba(15, 36, 56, 0.98), rgba(8, 21, 33, 0.99));
    box-shadow: var(--shadow);
  }

  .palace-header[data-open] .palace-nav__list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .palace-header[data-open] .palace-nav__link {
    display: flex;
    width: 100%;
    min-height: 44px;
    padding: 0.65rem 0.8rem;
    border-radius: 12px;
    font-size: 0.95rem;
  }

  .palace-header[data-open] .palace-nav__link[aria-current="page"] {
    box-shadow: inset 2px 0 0 var(--gold);
  }

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

@media (max-width: 720px) {
  body::before,
  body::after {
    opacity: 0.55;
  }

  .brand-mark__sub {
    display: none;
  }

  .version-badge__label {
    display: none;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .timeline__item {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .footer-brand__address,
  .footer-brand__note {
    font-size: 0.86rem;
  }
}

@media (max-width: 620px) {
  .palace-header__rail {
    gap: 0.65rem;
  }

  .brand-mark {
    gap: 0.55rem;
  }

  .brand-mark__seal {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .brand-mark__name {
    font-size: 0.98rem;
    letter-spacing: 0.08em;
  }

  .header-tools {
    gap: 0.35rem;
  }

  .header-cta {
    min-height: 36px;
    padding: 0.46rem 0.72rem;
    font-size: 0.8rem;
  }

  .nav-toggle {
    min-height: 36px;
    padding: 0.46rem 0.62rem;
  }

  .nav-toggle__text {
    display: none;
  }

  .version-badge {
    padding: 0.42rem 0.58rem;
  }

  .version-badge__code {
    font-size: 0.68rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.4rem;
  }

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

@media (max-width: 430px) {
  .header-cta {
    display: none;
  }

  .palace-header__rail {
    grid-template-columns: auto 1fr;
  }

  .header-tools {
    justify-self: end;
  }

  .palace-header[data-open] .palace-nav {
    right: 12px;
    left: 12px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}