:root {
  --color-primary: #E47A54;
  --color-ink: #3A3A3A;
  --color-paper: #F5F1E8;
  --color-muted: #B0A79A;
  --color-sage: #7B9E77;
  --color-sage-light: #E4E9DF;
  --color-navy: #1D3557;
  --color-charcoal: #212121;
  --color-gold: #B8875A;
  --color-line: rgba(58, 58, 58, 0.2);
  --font-display: 'DIN Alternate', 'Rajdhani', 'Arial Narrow', sans-serif;
  --font-body: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Roboto Mono', monospace;
  --content-max: 76rem;
  --header-height: 4.5rem;
  --shadow-panel: 0 12px 32px rgba(29, 53, 87, 0.2);
  --transition: 0.28s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main, section, header, footer, nav {
  display: block;
}

img, svg, video {
  max-width: 100%;
  height: auto;
}

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

button {
  font: inherit;
}

::selection {
  background: var(--color-primary);
  color: var(--color-paper);
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.container {
  width: min(100% - 2rem, var(--content-max));
  margin-inline: auto;
}

.section {
  padding-block: clamp(2rem, 6vw, 4.5rem);
}

.section--muted {
  background: var(--color-sage-light);
}

.section--dark {
  background: var(--color-navy);
  color: var(--color-paper);
}

.page-header {
  margin-bottom: 2rem;
  padding-block: clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  border-left: 0.45rem solid var(--color-primary);
  padding-left: 0.75rem;
}

.section--dark .page-title,
.section--dark .page-subtitle {
  color: var(--color-paper);
}

.page-subtitle {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 0.75rem;
  max-width: 60ch;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-heading__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.mono-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-muted);
  text-transform: uppercase;
}

.slash-mark {
  display: inline-block;
  width: 2rem;
  height: 2px;
  background: var(--color-primary);
  transform: skewX(-45deg);
  vertical-align: middle;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--color-primary);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--color-ink);
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.2rem;
  border: 2px solid var(--color-navy);
  background: transparent;
  color: var(--color-navy);
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  background: var(--color-navy);
  color: var(--color-paper);
}

.btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-paper);
}

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

.btn--ghost {
  border-color: var(--color-paper);
  color: var(--color-paper);
}

.btn--ghost:hover {
  background: var(--color-paper);
  color: var(--color-charcoal);
}

.cut-panel {
  position: relative;
  background: var(--color-sage-light);
  padding: 1.5rem;
  border-left: 0.3rem solid var(--color-primary);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.grid-2,
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 50rem) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 64rem) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.img-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--color-sage-light);
  border: 1px solid var(--color-line);
  overflow: hidden;
}

.img-frame::after {
  content: attr(data-label);
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink);
  background: var(--color-paper);
  padding: 0.25rem 0.5rem;
}

.stat {
  display: inline-flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem;
  background: var(--color-navy);
  color: var(--color-paper);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.stat__value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-primary);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-paper);
  opacity: 0.78;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
}

.data-table tbody tr:nth-child(odd) {
  background: var(--color-sage-light);
}

.data-table th {
  background: var(--color-navy);
  color: var(--color-paper);
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* ---------- Header ---------- */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  z-index: 3000;
  background: transparent;
  pointer-events: none;
}

.reading-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
  transition: width 0.1s linear;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 4000;
  background: var(--color-primary);
  color: var(--color-paper);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: relative;
  z-index: 1000;
  background: var(--color-navy);
  color: var(--color-paper);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 55%, var(--color-gold));
}

.site-header__bar {
  max-width: 80rem;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  min-height: var(--header-height);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: inherit;
}

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
  color: var(--color-navy);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.45rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.site-brand__slogan {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

.menu-orb {
  position: relative;
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #B8573A);
  color: var(--color-navy);
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(228, 122, 84, 0.22);
  transition: background var(--transition), transform var(--transition);
}

.menu-orb::after {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px dashed rgba(245, 241, 232, 0.35);
}

.menu-orb:hover {
  transform: scale(1.04);
}

.menu-orb[aria-expanded="true"] {
  background: var(--color-paper);
  color: var(--color-primary);
}

.menu-orb__line {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  margin: 2px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.site-nav {
  position: fixed;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  z-index: 2500;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.site-nav[data-open] {
  visibility: visible;
  opacity: 1;
}

.site-nav__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(29, 53, 87, 0.62);
  backdrop-filter: blur(2px);
}

.site-nav__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(30rem, 100%);
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--color-paper);
  color: var(--color-ink);
  transform: translateX(100%);
  transition: transform 0.32s ease;
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.site-nav__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-gold));
  z-index: 1;
}

.site-nav[data-open] .site-nav__panel {
  transform: none;
}

.site-nav__top {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  background: var(--color-sage-light);
  border-bottom: 1px solid var(--color-line);
}

.site-nav__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--color-navy);
  font-weight: 700;
}

.site-nav__close {
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: var(--color-charcoal);
  color: var(--color-paper);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.site-nav__close:hover {
  background: var(--color-primary);
  color: var(--color-navy);
}

.site-nav__quick {
  flex-shrink: 0;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-line);
}

.site-nav__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.quick-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.95rem 0.9rem;
  background: var(--color-sage-light);
  border: 1px solid rgba(123, 158, 119, 0.3);
  color: var(--color-ink);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.quick-card:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
  color: var(--color-paper);
  transform: translateY(-2px);
}

.quick-card__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-gold);
}

.quick-card:hover .quick-card__index {
  color: var(--color-paper);
}

.quick-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.2;
}

.quick-card__sub {
  font-size: 0.75rem;
  color: var(--color-muted);
}

.quick-card:hover .quick-card__sub {
  color: rgba(245, 241, 232, 0.85);
}

.site-nav__main {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
}

.site-nav__list {
  list-style: none;
}

.site-nav__item {
  border-bottom: 1px solid var(--color-line);
}

.site-nav__item:last-child {
  border-bottom: none;
}

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.85rem 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  transition: color 0.2s ease, transform 0.2s ease, padding-left 0.2s ease;
}

.site-nav__link:hover {
  color: var(--color-primary);
  transform: translateX(0.25rem);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gold);
  font-weight: 400;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-primary);
  border-left: 4px solid var(--color-primary);
  padding-left: 0.75rem;
}

.site-nav__meta {
  flex-shrink: 0;
  padding: 1rem 1.5rem;
  background: var(--color-navy);
  color: var(--color-paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.trust-badge::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  background: var(--color-sage);
  box-shadow: 0 0 0 3px rgba(123, 158, 119, 0.25);
}

@media (max-width: 30rem) {
  .quick-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--color-charcoal);
  color: var(--color-paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
}

.site-footer__top {
  max-width: 80rem;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 3rem 1.5rem 2rem;
}

@media (min-width: 40rem) {
  .site-footer__top {
    grid-template-columns: 1.5fr 1fr 1.2fr;
  }
}

.site-brand--footer {
  color: var(--color-paper);
}

.site-brand--footer .site-brand__slogan {
  color: var(--color-gold);
}

.site-footer__desc {
  max-width: 32rem;
  margin-top: 1rem;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.site-footer__heading {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 0.85rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--color-primary);
}

.site-footer__list {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.site-footer__list a {
  font-family: var(--font-mono);
  color: inherit;
  transition: color 0.2s ease;
}

.site-footer__list a:hover {
  color: var(--color-primary);
}

.site-footer__contact-list {
  list-style: none;
  display: grid;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.site-footer__label {
  display: inline-block;
  min-width: 2.5rem;
  color: var(--color-gold);
  margin-right: 0.5rem;
}

.site-footer__bottom {
  max-width: 80rem;
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-top: 1px solid rgba(245, 241, 232, 0.14);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
}

/* ---------- Responsive & Motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto !important;
  }
}