:root {
  --space-blue: #0B1E3A;
  --midnight: #081225;
  --gold-faint: #F4D58D;
  --gold-deep: #C9A227;
  --crimson: #B22222;
  --porcelain: #F7F3EB;
  --smoke: #D8D5CF;
  --graphite: #1E222A;
  --line-gold: #D9B96B;
  --bg-body:
    radial-gradient(circle at 88% 12%, rgba(178, 34, 34, 0.13), transparent 36%),
    radial-gradient(circle at 8% 10%, rgba(244, 213, 141, 0.10), transparent 30%),
    linear-gradient(160deg, #0B1E3A 0%, #081225 100%);
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Inter", "HarmonyOS Sans", "PingFang SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --shadow-soft: 0 16px 48px rgba(0, 0, 0, 0.28);
  --border-faint: 1px solid rgba(217, 185, 107, 0.20);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-body);
  background-color: var(--midnight);
  color: var(--porcelain);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  color: var(--porcelain);
  margin: 0 0 0.6em;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.5rem;
}

a {
  color: var(--gold-faint);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.2s ease;
}

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

:focus-visible {
  outline: 2px solid var(--gold-faint);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(201, 162, 39, 0.4);
  color: var(--porcelain);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(20px, 3vw, 40px);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 2000;
  background: linear-gradient(135deg, var(--gold-faint), var(--gold-deep));
  color: var(--midnight);
  padding: 10px 18px;
  border-radius: 0 0 12px 12px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-soft);
  transition: top 0.2s ease;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 12px 16px 16px;
}

.site-header__inner {
  max-width: 1180px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2.5vw, 20px);
  background: linear-gradient(135deg, rgba(11, 30, 58, 0.94), rgba(8, 18, 37, 0.98));
  border: 1px solid rgba(217, 185, 107, 0.30);
  border-radius: 999px;
  padding: 8px 12px 8px 20px;
  box-shadow: var(--shadow-soft);
  position: relative;
}

.site-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--porcelain);
}

.site-brand:hover {
  color: var(--porcelain);
}

.site-brand__mark {
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--gold-faint);
  line-height: 1.2;
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .site-brand__mark,
  .site-footer__brand {
    color: transparent;
    background-image: linear-gradient(135deg, var(--gold-faint), var(--gold-deep));
    -webkit-background-clip: text;
    background-clip: text;
  }
}

.site-brand__tagline {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--smoke);
  border-left: 1px solid var(--line-gold);
  padding-left: 10px;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.site-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 4px;
}

.site-nav__link {
  display: block;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--smoke);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.site-nav__link:hover {
  color: var(--porcelain);
  background: rgba(247, 243, 235, 0.06);
  text-decoration: none;
}

.site-nav__link[aria-current="page"] {
  color: var(--midnight);
  background: linear-gradient(135deg, var(--gold-faint), var(--gold-deep));
  font-weight: 700;
}

.site-header__action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(217, 185, 107, 0.50);
  border-radius: 999px;
  padding: 8px 16px;
  color: var(--gold-faint);
  background: rgba(201, 162, 39, 0.08);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.site-header__action:hover {
  background: rgba(201, 162, 39, 0.18);
  border-color: var(--gold-deep);
  color: var(--porcelain);
  transform: translateY(-1px);
  text-decoration: none;
}

.action-arrow {
  transition: transform 0.2s ease;
}

.site-header__action:hover .action-arrow {
  transform: translateX(3px);
}

.site-nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border: 1px solid rgba(217, 185, 107, 0.28);
  border-radius: 50%;
  background: rgba(11, 30, 58, 0.60);
  color: var(--porcelain);
  cursor: pointer;
  position: relative;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-nav__toggle:hover {
  border-color: var(--gold-deep);
  background: rgba(201, 162, 39, 0.15);
}

.site-nav__toggle-icon {
  width: 20px;
  height: 2px;
  background: var(--porcelain);
  border-radius: 2px;
  display: block;
  position: relative;
  transition: background 0.2s ease;
}

.site-nav__toggle-icon::before,
.site-nav__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--porcelain);
  border-radius: 2px;
  transition: transform 0.25s ease;
}

.site-nav__toggle-icon::before {
  top: -6px;
}

.site-nav__toggle-icon::after {
  top: 6px;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon {
  background: transparent;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-header__progress {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 4px;
  height: 2px;
  border-radius: 999px;
  background: rgba(217, 185, 107, 0.14);
  overflow: hidden;
  pointer-events: none;
}

.site-header__progress::before {
  content: "";
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  background: linear-gradient(90deg, var(--gold-faint), var(--gold-deep));
  border-radius: inherit;
}

@media (max-width: 960px) {
  .site-nav__toggle {
    display: flex;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open="true"] {
    display: flex;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    z-index: 200;
    flex-direction: column;
    background: linear-gradient(145deg, var(--space-blue), var(--midnight));
    border: 1px solid rgba(217, 185, 107, 0.30);
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
    padding: 12px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 4px;
  }

  .site-nav__link {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
  }

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

@media (max-width: 640px) {
  .site-brand__tagline {
    display: none;
  }

  .site-header__action {
    padding: 8px 12px;
    font-size: 12px;
  }
}

.site-footer {
  margin-top: clamp(64px, 10vw, 120px);
  background: var(--midnight);
  border-top: 1px solid rgba(217, 185, 107, 0.25);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-faint), var(--gold-deep), var(--crimson));
  transform: scaleX(0.62);
  transform-origin: left;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(48px, 8vw, 80px) clamp(32px, 5vw, 56px);
}

.site-footer__brand {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: var(--porcelain);
  text-decoration: none;
  margin-bottom: 16px;
  line-height: 1.2;
}

.site-footer__brand:hover {
  color: var(--gold-faint);
  text-decoration: none;
}

.site-footer__statement {
  max-width: 42ch;
  color: var(--smoke);
  font-size: 14px;
}

.site-footer__heading {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-faint);
  border-bottom: 1px solid rgba(217, 185, 107, 0.20);
  padding-bottom: 10px;
  margin-bottom: 16px;
  font-weight: 700;
}

.site-footer__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.site-footer__nav-link {
  color: var(--smoke);
  font-size: 14px;
  text-decoration: none;
  display: inline-block;
  padding: 4px 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

.site-footer__nav-link:hover {
  color: var(--gold-faint);
  transform: translateX(3px);
  text-decoration: none;
}

.site-footer__contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
}

.site-footer__contact-item {
  display: flex;
  gap: 10px;
}

.site-footer__contact-label {
  color: var(--gold-faint);
  font-size: 12px;
  letter-spacing: 0.08em;
  min-width: 3em;
  font-weight: 600;
}

.site-footer__contact-value {
  color: var(--smoke);
  word-break: break-word;
}

.site-footer__note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(217, 185, 107, 0.18);
  font-size: 12px;
  color: rgba(216, 213, 207, 0.80);
}

.site-footer__bar {
  border-top: 1px solid rgba(217, 185, 107, 0.16);
  background: rgba(0, 0, 0, 0.20);
  padding-block: 18px;
}

.site-footer__bar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--smoke);
}

.site-footer__bar-inner p {
  margin: 0;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.site-footer__legal-link {
  color: var(--smoke);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s ease;
}

.site-footer__legal-link:hover {
  color: var(--gold-faint);
  text-decoration: none;
}

@media (max-width: 900px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__lead {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .site-footer__bar-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-faint);
  font-weight: 700;
  border-left: 2px solid var(--gold-deep);
  padding-left: 10px;
  margin-bottom: 12px;
}

.gold-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--line-gold), transparent);
  margin: 24px 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--smoke);
  font-size: 16px;
  max-width: 60ch;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--gold-faint), var(--gold-deep));
  color: var(--midnight);
  border: 0;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 4px 18px rgba(201, 162, 39, 0.20);
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s ease;
  text-decoration: none;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 162, 39, 0.30);
  color: var(--midnight);
  text-decoration: none;
}

.button--ghost {
  background: transparent;
  border: 1px solid var(--line-gold);
  color: var(--gold-faint);
  box-shadow: none;
}

.button--ghost:hover {
  background: rgba(201, 162, 39, 0.10);
  color: var(--porcelain);
}

.panel {
  background: rgba(8, 18, 37, 0.70);
  border: var(--border-faint);
  border-radius: 28px;
  padding: clamp(24px, 4vw, 48px);
  box-shadow: var(--shadow-soft);
}

.panel--graphite {
  background: var(--graphite);
}

.panel--glow {
  background: linear-gradient(145deg, rgba(244, 213, 141, 0.06), transparent 50%), rgba(8, 18, 37, 0.80);
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 1000px) {
  .page-grid--aside {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
}

.editorial-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 900px) {
  .editorial-grid--split {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: start;
  }
}

.editorial-note {
  border-left: 1px solid var(--line-gold);
  padding-left: 16px;
  margin-top: 12px;
  color: var(--smoke);
  font-size: 14px;
}

.stat-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  margin: 8px 0 16px;
}

.stat-line__number {
  font-family: var(--font-serif);
  font-size: clamp(36px, 7vw, 80px);
  line-height: 1;
  color: var(--gold-faint);
}

.stat-line__label {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--smoke);
  text-transform: uppercase;
}

.anchor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.anchor-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 12px 4px;
  border-bottom: 1px solid rgba(217, 185, 107, 0.18);
  color: var(--smoke);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease, border-color 0.2s ease, padding 0.2s ease;
}

.anchor-list a:hover {
  color: var(--porcelain);
  border-color: var(--gold-deep);
  padding-left: 8px;
  text-decoration: none;
}

.anchor-list a::after {
  content: "→";
  color: var(--gold-deep);
  flex: 0 0 auto;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(217, 185, 107, 0.20);
  border-radius: 18px;
  background: rgba(8, 18, 37, 0.55);
  margin: 1rem 0;
}

.table-wrap table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.table-wrap th,
.table-wrap td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(217, 185, 107, 0.12);
}

.table-wrap th {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-faint);
  background: rgba(201, 162, 39, 0.06);
}

.table-wrap tr:last-child td {
  border-bottom: 0;
}

.image-placeholder {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(217, 185, 107, 0.22);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(244, 213, 141, 0.08), rgba(178, 34, 34, 0.10) 45%, rgba(11, 30, 58, 0.50)),
    repeating-linear-gradient(90deg, rgba(217, 185, 107, 0.08) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(0deg, rgba(217, 185, 107, 0.08) 0 1px, transparent 1px 80px);
}

.image-placeholder::after {
  content: attr(data-caption);
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 24px 16px 12px;
  font-size: 12px;
  color: var(--smoke);
  background: linear-gradient(transparent, rgba(8, 18, 37, 0.85));
}

.image-placeholder--portrait {
  aspect-ratio: 3 / 4;
}

.image-placeholder--wide {
  aspect-ratio: 21 / 9;
}

.caption {
  font-size: 12px;
  color: var(--smoke);
  padding-top: 8px;
  border-top: 1px solid rgba(217, 185, 107, 0.14);
  margin-top: 8px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  padding: 8px 0;
  margin: 0 0 24px;
  font-size: 13px;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(216, 213, 207, 0.40);
}

.breadcrumb a {
  color: var(--smoke);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--porcelain);
}

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

.toc {
  border: 1px solid rgba(217, 185, 107, 0.20);
  border-radius: 18px;
  background: rgba(8, 18, 37, 0.60);
  padding: 20px 24px;
}

.toc__title {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-faint);
  margin-bottom: 10px;
}

.toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.toc__link {
  color: var(--smoke);
  font-size: 14px;
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
}

.toc__link:hover {
  color: var(--porcelain);
  border-bottom: 1px solid var(--gold-deep);
}

.article-header {
  padding-block: clamp(40px, 8vw, 88px) clamp(24px, 4vw, 48px);
  border-bottom: 1px solid rgba(217, 185, 107, 0.20);
  margin-bottom: clamp(28px, 5vw, 56px);
}

.article-title {
  font-size: clamp(34px, 7vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 16ch;
  margin-bottom: 12px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  color: var(--smoke);
  font-size: 13px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.article-meta__item {
  border-left: 1px solid var(--line-gold);
  padding-left: 10px;
}

.callout {
  border-left: 3px solid var(--crimson);
  background: rgba(178, 34, 34, 0.08);
  padding: 16px 20px;
  border-radius: 0 18px 18px 0;
  font-size: 14px;
  color: var(--smoke);
  margin: 1.5rem 0;
}

.callout--gold {
  border-left-color: var(--gold-deep);
  background: rgba(201, 162, 39, 0.08);
  color: var(--porcelain);
}

@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;
  }
}