/* ===================== 1. Reset ===================== */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, 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; cursor: pointer; }

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* ===================== 2. Tokens ===================== */
:root {
  --night: #0B1B2B;
  --deep: #122B45;
  --gold: #E0A94B;
  --sand: #8A6B4A;
  --teal: #3FE0C4;
  --violet: #7C5CFF;
  --mist: #F2F5F7;
  --light-sand: #F5E9D6;
  --graphite: #4E5A66;
  --alert: #E4572E;

  --ink: rgba(242, 245, 247, 0.86);
  --ink-soft: rgba(242, 245, 247, 0.66);
  --ink-faint: rgba(242, 245, 247, 0.48);
  --line: rgba(138, 107, 74, 0.42);
  --line-soft: rgba(242, 245, 247, 0.12);

  --shell: 1240px;
  --header-h: 68px;
  --cut: 14px;
  --cut-lg: 22px;
  --gap: 24px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font-display: "Saira Condensed", "Oswald", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ===================== 3. Base ===================== */
body {
  min-height: 100%;
  background-color: var(--night);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(242, 245, 247, 0.06) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(242, 245, 247, 0.06) 0 1px, transparent 1px 24px);
}

#main-content {
  position: relative;
  z-index: 1;
  display: block;
}

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

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  border-radius: 0;
}

/* ===================== 4. Layout utilities ===================== */
.og-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 24px;
}

.og-section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.og-section--light {
  background: var(--mist);
  color: var(--night);
}

.og-section--light .og-title,
.og-section--light .og-title--sub,
.og-section--light .og-heading { color: var(--night); }

.og-section--light .og-prose { color: var(--graphite); }
.og-section--light .og-prose strong { color: var(--night); }
.og-section--light .og-eyebrow { color: #23705f; }
.og-section--light .og-eyebrow::before { background: var(--sand); }
.og-section--light .og-lede { color: var(--graphite); }
.og-section--light .og-note {
  background: var(--light-sand);
  color: var(--night);
  border-left-color: var(--sand);
}
.og-section--light .og-note--data { border-left-color: #23705f; }
.og-section--light .og-note--alert { border-left-color: var(--alert); }
.og-section--light .og-panel {
  background: var(--light-sand);
  border-color: rgba(138, 107, 74, 0.28);
  color: var(--night);
}
.og-section--light .og-card {
  background: var(--light-sand);
  border-color: rgba(138, 107, 74, 0.28);
  color: var(--night);
}
.og-section--light .og-card__text { color: var(--graphite); }
.og-section--light .og-card__meta { color: var(--sand); }
.og-section--light .og-breadcrumb { color: var(--graphite); }
.og-section--light .og-data__row { border-bottom-color: rgba(138, 107, 74, 0.32); }
.og-section--light .og-data__key { color: var(--graphite); }
.og-section--light .og-data__val { color: var(--sand); }

.og-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

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

.og-split {
  display: grid;
  grid-template-columns: minmax(200px, 26%) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.og-stack { display: grid; gap: 16px; }

/* ===================== 5. Typography ===================== */
.og-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--teal);
}

.og-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  flex: 0 0 auto;
  background: var(--gold);
}

.og-title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.2rem, 6vw, 5.5rem);
  line-height: 1.04;
  letter-spacing: 0.005em;
  color: var(--mist);
}

.og-title--sub {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.75rem, 3.6vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.og-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.35;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.og-lede {
  max-width: 40rem;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink);
}

.og-prose {
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
}

.og-prose > * + * { margin-top: 1.1em; }
.og-prose p { max-width: 38em; }
.og-prose strong { color: var(--gold); font-weight: 700; }
.og-prose h2,
.og-prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.og-prose a {
  color: var(--teal);
  border-bottom: 1px solid rgba(63, 224, 196, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.og-prose a:hover { color: var(--gold); border-bottom-color: var(--gold); }

.og-mono {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ===================== 6. Buttons ===================== */
.og-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.06em;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.og-btn:hover { transform: translateY(-1px); }

.og-btn:focus-visible {
  outline-color: var(--violet);
  box-shadow: inset 0 0 0 2px var(--violet);
}

.og-btn--primary { background: var(--gold); color: var(--night); }
.og-btn--primary:hover { background: var(--teal); color: var(--night); }

.og-btn--ghost {
  border-color: var(--line);
  background: rgba(18, 43, 69, 0.65);
  color: var(--mist);
}
.og-btn--ghost:hover { border-color: var(--teal); color: var(--teal); }

.og-btn--violet {
  border-color: rgba(124, 92, 255, 0.6);
  background: rgba(124, 92, 255, 0.12);
  color: #C9BBFF;
}
.og-btn--violet:hover { border-color: var(--violet); color: var(--mist); }

/* ===================== 7. Header ===================== */
.og-skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--gold);
  color: var(--night);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  transition: top 0.2s var(--ease);
}
.og-skip:focus { top: 12px; }

.og-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11, 27, 43, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.og-header.is-scrolled {
  background: rgba(8, 19, 31, 0.97);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.34);
}

.og-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: var(--header-h);
}

.og-header__brand {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 0 1 auto;
  min-width: 0;
}

.og-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.og-brand__mark {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, var(--gold) 0%, var(--teal) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}

.og-brand__text { display: grid; gap: 1px; }

.og-brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.og-brand__sub {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  line-height: 1.4;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
}

.og-header__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding-left: 18px;
  border-left: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.og-header__range { color: var(--ink-soft); }

.og-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--line);
  background: rgba(63, 224, 196, 0.07);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.og-tag--version {
  border-color: rgba(224, 169, 75, 0.5);
  background: rgba(224, 169, 75, 0.1);
  color: var(--gold);
}

.og-header__right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.og-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.og-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 10px;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  color: rgba(242, 245, 247, 0.78);
  transition: color 0.2s var(--ease);
}

.og-nav__link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s var(--ease), background-color 0.2s var(--ease);
}

.og-nav__link:hover { color: var(--teal); }
.og-nav__link:hover::after { transform: scaleX(1); background: var(--teal); }

.og-nav__link[aria-current="page"] { color: var(--mist); }
.og-nav__link[aria-current="page"]::after { transform: scaleX(1); background: var(--gold); }

.og-nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(18, 43, 69, 0.7);
  color: var(--mist);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
}

.og-nav-toggle__bars { display: grid; gap: 4px; width: 18px; }

.og-nav-toggle__bars i {
  display: block;
  height: 1px;
  background: var(--gold);
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.og-nav-toggle[aria-expanded="true"] .og-nav-toggle__bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.og-nav-toggle[aria-expanded="true"] .og-nav-toggle__bars i:nth-child(2) { opacity: 0; }
.og-nav-toggle[aria-expanded="true"] .og-nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}
.og-nav-toggle[aria-expanded="true"] { border-color: var(--teal); color: var(--teal); }

.og-actions { display: flex; align-items: center; gap: 10px; }

.og-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(242, 245, 247, 0.08);
  overflow: hidden;
}

.og-header__progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--teal) 100%);
  transition: transform 0.15s linear;
}

/* ===================== 8. Footer ===================== */
.og-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(64px, 9vw, 120px);
  background: linear-gradient(180deg, var(--night) 0%, #08131F 100%);
  border-top: 1px solid var(--line);
  color: var(--ink);
}

.og-footer::before {
  content: "";
  display: block;
  height: 10px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(224, 169, 75, 0.5) 0 1px,
    transparent 1px 24px
  );
}

.og-footer__inner { padding-block: clamp(40px, 6vw, 72px) 0; }

.og-footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 1.3fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 56px);
}

.og-footer__brand { display: grid; gap: 14px; align-content: start; }

.og-brand--footer .og-brand__name { font-size: 1.25rem; }

.og-footer__tagline {
  max-width: 22rem;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.og-footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.og-footer__links { display: grid; gap: 9px; }

.og-footer__links a {
  display: inline-block;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(242, 245, 247, 0.76);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.og-footer__links a:hover,
.og-footer__links a:focus-visible { color: var(--teal); padding-left: 6px; }

.og-footer__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
  margin-top: clamp(32px, 5vw, 56px);
  padding: 20px 22px;
  border: 1px solid var(--line-soft);
  background: rgba(18, 43, 69, 0.5);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(242, 245, 247, 0.82);
}

.og-footer__contact-item { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; }

.og-footer__label {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--sand);
}

.og-footer__service {
  margin-top: 14px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--ink-faint);
}

.og-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: 28px;
  padding-block: 20px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}

.og-footer__meta,
.og-footer__legal { letter-spacing: 0.04em; }

/* ===================== 9. Components ===================== */
.og-panel {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(18, 43, 69, 0.9) 0%, rgba(11, 27, 43, 0.9) 100%);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
}

.og-card {
  position: relative;
  display: block;
  padding: 22px;
  border: 1px solid var(--line-soft);
  background: rgba(18, 43, 69, 0.55);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

a.og-card:hover,
a.og-card:focus-visible {
  border-color: rgba(63, 224, 196, 0.55);
  background: rgba(18, 43, 69, 0.85);
  transform: translateY(-3px);
}

.og-card__kicker {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.og-card__title {
  margin-top: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.4;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.og-card__text {
  margin-top: 8px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(242, 245, 247, 0.72);
}

.og-card__meta {
  margin-top: 14px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.og-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  background: rgba(63, 224, 196, 0.07);
  font-family: var(--font-data);
  font-size: 0.75rem;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--mist);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.og-badge--gold {
  border-color: rgba(224, 169, 75, 0.5);
  background: rgba(224, 169, 75, 0.1);
  color: var(--gold);
}
.og-badge--teal {
  border-color: rgba(63, 224, 196, 0.5);
  background: rgba(63, 224, 196, 0.08);
  color: var(--teal);
}
.og-badge--violet {
  border-color: rgba(124, 92, 255, 0.55);
  background: rgba(124, 92, 255, 0.12);
  color: #C4B4FF;
}
.og-badge--alert {
  border-color: rgba(228, 87, 46, 0.5);
  background: rgba(228, 87, 46, 0.12);
  color: #FFB39B;
}

.og-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.og-live__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  animation: og-pulse 2s infinite;
}

@keyframes og-pulse {
  0% { box-shadow: 0 0 0 0 rgba(63, 224, 196, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(63, 224, 196, 0); }
  100% { box-shadow: 0 0 0 0 rgba(63, 224, 196, 0); }
}

.og-data {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
}

.og-data__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(138, 107, 74, 0.35);
}

.og-data__key {
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.og-data__val {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--gold);
}

.og-data__val--teal { color: var(--teal); }

.og-note {
  padding: 14px 16px 14px 18px;
  border-left: 2px solid var(--gold);
  background: rgba(224, 169, 75, 0.07);
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(242, 245, 247, 0.82);
}

.og-note--data { border-left-color: var(--teal); background: rgba(63, 224, 196, 0.07); }
.og-note--alert { border-left-color: var(--alert); background: rgba(228, 87, 46, 0.1); }

.og-list {
  display: grid;
  gap: 10px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(242, 245, 247, 0.8);
}

.og-list li { position: relative; padding-left: 20px; }

.og-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--teal);
}

.og-index {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.og-index__title {
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.og-index__list { display: grid; gap: 10px; }

.og-index__item {
  position: relative;
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(242, 245, 247, 0.7);
}

.og-index__item::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 0.55em;
  width: 9px;
  height: 1px;
  background: var(--sand);
}

.og-index__link { transition: color 0.2s var(--ease); }
.og-index__link:hover { color: var(--teal); }
.og-index__link[aria-current="page"] { color: var(--gold); }

.og-tick {
  height: 10px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line) 0 1px,
    transparent 1px 24px
  );
}

.og-diagonal {
  display: block;
  height: 1px;
  margin: clamp(32px, 5vw, 56px) 0;
  background: linear-gradient(90deg, rgba(63, 224, 196, 0.5) 0%, rgba(224, 169, 75, 0.35) 45%, transparent 100%);
  transform: skewY(-1deg);
  transform-origin: left center;
}

.og-frame {
  position: relative;
  padding: clamp(20px, 3vw, 40px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 43, 69, 0.55) 0%, rgba(11, 27, 43, 0.25) 100%);
}

.og-frame::before,
.og-frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--gold);
}

.og-frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.og-frame::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.og-frame__label {
  position: absolute;
  top: -0.75em;
  left: 24px;
  padding: 0 8px;
  background: var(--night);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.og-media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(135deg, var(--deep) 0%, var(--night) 58%, #14302b 100%);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.og-media::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(242, 245, 247, 0.06) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(242, 245, 247, 0.06) 0 1px, transparent 1px 24px);
}

.og-media--wide { aspect-ratio: 16 / 9; }
.og-media--tall { aspect-ratio: 3 / 4; }
.og-media--square { aspect-ratio: 1 / 1; }

.og-media__img,
.og-media img,
.og-media picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.og-media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(242, 245, 247, 0.82);
  background: linear-gradient(0deg, rgba(11, 27, 43, 0.94) 0%, rgba(11, 27, 43, 0) 100%);
}

.og-breadcrumb {
  padding-block: 18px;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

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

.og-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--sand);
}

.og-breadcrumb a { transition: color 0.2s var(--ease); }
.og-breadcrumb a:hover { color: var(--teal); }
.og-breadcrumb [aria-current="page"] { color: var(--gold); }

/* ===================== 10. Reveal ===================== */
html.og-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.42s var(--ease), transform 0.42s var(--ease);
}

html.og-js [data-reveal="1"] { transition-delay: 0.06s; }
html.og-js [data-reveal="2"] { transition-delay: 0.12s; }
html.og-js [data-reveal="3"] { transition-delay: 0.18s; }
html.og-js [data-reveal="4"] { transition-delay: 0.24s; }

html.og-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ===================== 11. Responsive ===================== */
@media (max-width: 1180px) {
  .og-header__range { display: none; }
}

@media (max-width: 1024px) {
  :root { --header-h: 60px; }

  .og-shell { padding-inline: 20px; }

  .og-header__inner { gap: 12px; }

  .og-header__meta { padding-left: 14px; }

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

  .og-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 80;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 10px 0 20px;
    background: linear-gradient(180deg, #0B1B2B 0%, #122B45 100%);
    border-bottom: 1px solid rgba(224, 169, 75, 0.35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    pointer-events: none;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s var(--ease);
  }

  .og-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .og-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-inline: 20px;
  }

  .og-nav__link {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px dashed rgba(138, 107, 74, 0.35);
    font-size: 1rem;
  }

  .og-nav__link::after { left: 4px; right: auto; width: 22px; bottom: 10px; }

  .og-header__right { margin-left: 0; }

  .og-actions {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 85;
    gap: 10px;
    padding: 10px 20px calc(10px + env(safe-area-inset-bottom, 0px));
    background: rgba(11, 27, 43, 0.97);
    border-top: 1px solid rgba(224, 169, 75, 0.32);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  .og-actions .og-btn { flex: 1 1 0; }

  body { padding-bottom: 72px; }

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

  .og-index {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 16px;
  }

  .og-index__list { grid-auto-flow: column; grid-auto-columns: max-content; gap: 18px; overflow-x: auto; padding-bottom: 4px; }
  .og-index__item::before { display: none; }

  .og-span-3,
  .og-span-4 { grid-column: span 6; }
}

@media (max-width: 900px) {
  .og-footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .og-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .og-span-3,
  .og-span-4,
  .og-span-5,
  .og-span-6,
  .og-span-7,
  .og-span-8 { grid-column: span 12; }

  .og-grid { gap: 18px; }
  .og-panel { padding: 18px; }
  .og-card { padding: 18px; }
  .og-header__meta { display: none; }
  .og-footer__contact { flex-direction: column; gap: 10px; }
  .og-footer__contact-item { display: block; }
  .og-footer__label { display: block; margin-bottom: 2px; }
}

@media (max-width: 560px) {
  .og-shell { padding-inline: 16px; }
  .og-footer__top { grid-template-columns: minmax(0, 1fr); }
  .og-btn { padding: 9px 12px; font-size: 0.8125rem; }
  .og-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ===================== 12. Reduced motion ===================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  html.og-js [data-reveal],
  html.og-js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .og-nav,
  .og-nav[data-open],
  .og-nav-toggle__bars i,
  .og-header__progress-bar,
  .og-btn,
  .og-card,
  .og-footer__links a,
  .og-skip {
    transition: none !important;
  }

  .og-live__dot { animation: none; }
}