/* ==========================================================================
   OG体育现金 · 共享外壳样式 /assets/site.css
   1 重置  2 变量  3 排版  4 头部轨道  5 页脚  6 通用积木  7 响应式与偏好
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5,
p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; }

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

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

button { background: none; border: 0; padding: 0; cursor: pointer; color: inherit; }

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

input, button, textarea, select { font: inherit; letter-spacing: inherit; }

:focus-visible {
  outline: 2px solid #46E0C8;
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B2B24;
  --ink-deep: #08201b;
  --moss: #17453B;
  --carbon: #121516;
  --carbon-deep: #0d1011;
  --paper: #F2EFE6;
  --manila: #E3D6B0;
  --cyan: #46E0C8;
  --orange: #FF7A3C;
  --sage: #86A79D;
  --alert: #C6543F;

  --line: rgba(134, 167, 157, 0.30);
  --line-soft: rgba(134, 167, 157, 0.16);
  --cyan-soft: rgba(70, 224, 200, 0.10);

  --rail-w: 236px;
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1240px;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", -apple-system, BlinkMacSystemFont,
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
               Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --t-fast: 150ms;
  --t-mid: 220ms;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

#main-content { display: block; scroll-margin-top: 20px; }
#main-content:focus { outline: none; }

.og-no-scroll { overflow: hidden; }

/* ---------- 4. 头部：移动端档案脊 / 桌面端索引轨道 ---------- */
.og-skip {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  transform: translateY(-180%);
  display: inline-block;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  border-radius: 2px;
  transition: transform 160ms var(--ease);
}
.og-skip:focus,
.og-skip:focus-visible { transform: translateY(0); }

.og-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--carbon);
  color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.og-header__bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px var(--gutter);
  background: var(--carbon);
}

.og-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* 品牌 */
.og-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
  min-width: 0;
}

.og-brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: rgba(70, 224, 200, 0.07);
  border: 1px solid var(--cyan);
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.og-brand__mark::before,
.og-brand__mark::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  border: 1px solid var(--orange);
  opacity: 0.9;
}
.og-brand__mark::before { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.og-brand__mark::after { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }

.og-brand:hover .og-brand__mark { background: rgba(70, 224, 200, 0.16); }

.og-brand__glyph {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.og-brand__text {
  display: block;
  min-width: 0;
}

.og-brand__name {
  display: block;
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--paper);
}

.og-brand__line {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--sage);
  max-width: 48vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 抽屉开关 */
.og-nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.og-nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }

.og-nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 10px;
  display: block;
}
.og-nav-toggle__bars::before,
.og-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--t-mid) var(--ease), opacity var(--t-mid) var(--ease);
}
.og-nav-toggle__bars::before { top: 0; }
.og-nav-toggle__bars::after { bottom: 0; }

.og-header[data-open] .og-nav-toggle__bars::before { transform: translateY(4px) rotate(45deg); }
.og-header[data-open] .og-nav-toggle__bars::after { transform: translateY(-4px) rotate(-45deg); }
.og-header[data-open] .og-nav-toggle { border-color: var(--orange); color: var(--orange); }

/* 导航：移动端全屏抽屉 */
.og-nav {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 86px var(--gutter) 40px;
  overflow-y: auto;
  background:
    radial-gradient(120% 70% at 100% 0%, rgba(70, 224, 200, 0.12), transparent 62%),
    linear-gradient(180deg, #0e352c 0%, var(--ink) 58%, var(--ink-deep) 100%);
  color: var(--paper);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-14px);
  transition: opacity var(--t-mid) var(--ease),
              transform var(--t-mid) var(--ease),
              visibility 0s linear var(--t-mid);
}
.og-header[data-open] .og-nav {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--t-mid) var(--ease),
              transform var(--t-mid) var(--ease),
              visibility 0s;
}

.og-nav__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--sage);
  display: flex;
  align-items: center;
  gap: 10px;
}
.og-nav__label::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--cyan);
}

.og-nav__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-soft);
}

.og-nav__item { border-bottom: 1px dashed var(--line-soft); }

.og-nav__link {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 10px;
  padding: 14px 8px 14px 12px;
  border-inline-start: 2px solid transparent;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
  transition: color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.og-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--sage);
  transition: color var(--t-fast) var(--ease);
}

.og-nav__text { position: relative; display: inline-block; }

.og-nav__link:hover {
  color: var(--cyan);
  background: rgba(70, 224, 200, 0.07);
  border-inline-start-color: rgba(70, 224, 200, 0.55);
}
.og-nav__link:hover .og-nav__num { color: var(--cyan); }

.og-nav__link[aria-current="page"] {
  color: var(--cyan);
  background: var(--cyan-soft);
  border-inline-start-color: var(--cyan);
}
.og-nav__link[aria-current="page"] .og-nav__num { color: var(--cyan); }
.og-nav__link[aria-current="page"] .og-nav__text::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 9px;
  background: var(--orange);
  vertical-align: middle;
}

.og-nav__foot {
  margin-top: auto;
  display: grid;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.og-nav__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

.og-nav__utils {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.og-nav__util {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--manila);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.og-nav__util:hover { border-color: var(--orange); color: var(--orange); }

/* 轨道底部数据条（桌面） */
.og-header__meta { display: none; }

.og-meta__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 4px 0;
}
.og-meta__row + .og-meta__row { border-top: 1px dashed var(--line-soft); }
.og-meta__key { color: var(--sage); }
.og-meta__val { color: var(--cyan); font-variant-numeric: tabular-nums; }

/* 滚动进度 */
.og-progress {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background: rgba(134, 167, 157, 0.18);
  pointer-events: none;
}
.og-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: transform 90ms linear;
}

/* ---------- 5. 页脚 ---------- */
.og-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--carbon) 0%, var(--carbon-deep) 100%);
  border-top: 1px solid var(--line);
  color: var(--paper);
}
.og-footer::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 200px;
  pointer-events: none;
  background:
    radial-gradient(120% 100% at 16% 0%, rgba(70, 224, 200, 0.13), transparent 62%),
    linear-gradient(180deg, rgba(46, 127, 107, 0.20), transparent 80%);
}

.og-footer__inner {
  position: relative;
  padding-block: clamp(36px, 6vw, 60px) 18px;
}

.og-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px 26px;
}

.og-foot__brand { min-width: 0; }

.og-brand--foot { gap: 14px; }
.og-brand--foot .og-brand__mark { width: 46px; height: 46px; }
.og-brand--foot .og-brand__name { font-size: 18px; }
.og-brand--foot .og-brand__line { max-width: none; font-size: 11px; }

.og-foot__claim {
  margin-top: 16px;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage);
}

.og-foot__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.og-foot__fact {
  background: rgba(11, 43, 36, 0.55);
  padding: 9px 10px;
  display: grid;
  gap: 2px;
}
.og-foot__fact-k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--sage);
}
.og-foot__fact-v {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.og-foot__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
}
.og-foot__title::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
}

.og-foot__list li + li { margin-top: 9px; }

.og-foot__link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14.5px;
  color: var(--paper);
  background-image: linear-gradient(var(--cyan), var(--cyan));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: color var(--t-fast) var(--ease), background-size 180ms var(--ease);
}
.og-foot__link:hover,
.og-foot__link:focus-visible { color: var(--cyan); background-size: 100% 1px; }

.og-foot__index {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-soft);
}

.og-foot__index-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--sage);
  margin-bottom: 10px;
}

.og-index__run {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.og-index__cell {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sage);
  user-select: none;
}
.og-index__cell:nth-child(6n + 1) { color: var(--manila); border-color: var(--line); }
.og-index__cell:nth-child(9n + 4) { color: var(--orange); border-color: rgba(255, 122, 60, 0.35); }

.og-foot__contact {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-soft);
  display: grid;
  gap: 6px;
}

.og-foot__contact-line {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--sage);
  overflow-wrap: anywhere;
}

.og-foot__mono {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--manila);
  margin-inline: 4px;
}

.og-foot__dot { color: var(--orange); margin-inline: 8px; }

.og-foot__note {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(134, 167, 157, 0.85);
}

.og-foot__legal {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
}

.og-foot__copy {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--sage);
}

.og-foot__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}
.og-foot__legal-links .og-foot__link {
  font-size: 12.5px;
  color: var(--sage);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.og-foot__legal-links .og-foot__link:hover { color: var(--cyan); }

.og-footer__watermark {
  position: relative;
  margin: 4px 0 -14px;
  padding-inline: var(--gutter);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px, 11vw, 152px);
  line-height: 0.82;
  letter-spacing: -0.03em;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  color: rgba(242, 239, 230, 0.05);
  user-select: none;
  pointer-events: none;
}

/* ---------- 6. 通用积木 ---------- */
.og-shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.og-section { padding-block: clamp(30px, 5vw, 60px); }

.og-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .og-grid--asym { grid-template-columns: 1.7fr 1fr; align-items: start; }
  .og-grid--asym-rev { grid-template-columns: 1fr 1.7fr; align-items: start; }
}

.og-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--sage);
}
.og-crumbs li { display: flex; align-items: center; gap: 8px; }
.og-crumbs li + li::before {
  content: "›";
  color: var(--orange);
  opacity: 0.85;
}
.og-crumbs a:hover { color: var(--cyan); }
.og-crumbs [aria-current="page"] { color: var(--paper); }

.og-prose { max-width: 68ch; }
.og-prose > * + * { margin-top: 0.9em; }
.og-prose h2 {
  margin-top: 1.8em;
  font-size: clamp(22px, 3vw, 30px);
  color: var(--paper);
}
.og-prose h3 {
  margin-top: 1.5em;
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--paper);
}
.og-prose p { color: rgba(242, 239, 230, 0.86); }
.og-prose strong { color: var(--cyan); font-weight: 700; }
.og-prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(70, 224, 200, 0.45);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.og-prose a:hover { color: var(--paper); border-bottom-color: var(--orange); }
.og-prose li {
  position: relative;
  padding-left: 18px;
  color: rgba(242, 239, 230, 0.86);
}
.og-prose li + li { margin-top: 0.45em; }
.og-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.og-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.og-kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--cyan);
}

.og-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  line-height: 1.2;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
}
.og-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-soft);
  transform: translateY(-1px);
}
.og-btn--signal {
  border-color: rgba(255, 122, 60, 0.65);
  color: var(--orange);
}
.og-btn--signal:hover {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--carbon);
}
.og-btn--ghost {
  border-color: transparent;
  color: var(--sage);
}
.og-btn--ghost:hover { border-color: var(--line); color: var(--paper); background: transparent; }
.og-btn--block { width: 100%; }

.og-panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(165deg, rgba(23, 69, 59, 0.72), rgba(11, 43, 36, 0.92));
  box-shadow: inset 0 1px 0 rgba(242, 239, 230, 0.05);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.og-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(242, 239, 230, 0.045) 0 1px, transparent 1px 7px);
  opacity: 0.6;
}
.og-panel:hover {
  transform: translateY(-2px);
  border-color: rgba(70, 224, 200, 0.6);
}
.og-panel > * { position: relative; z-index: 1; }

.og-stat {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(40px, 8vw, 64px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.og-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--sage);
  white-space: nowrap;
}
.og-badge--cyan { color: var(--cyan); border-color: rgba(70, 224, 200, 0.5); background: var(--cyan-soft); }
.og-badge--signal { color: var(--orange); border-color: rgba(255, 122, 60, 0.5); }
.og-badge--alert { color: var(--alert); border-color: rgba(198, 84, 63, 0.55); }

.og-rule {
  height: 0;
  border: 0;
  border-top: 1px dashed var(--line);
  margin-block: clamp(18px, 3vw, 30px);
}

.og-note {
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sage);
}

.og-figure {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background:
    repeating-linear-gradient(135deg, rgba(70, 224, 200, 0.055) 0 1px, transparent 1px 9px),
    linear-gradient(160deg, var(--moss) 0%, var(--ink) 72%);
}
.og-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.og-figure figcaption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--paper);
  background: linear-gradient(0deg, rgba(11, 43, 36, 0.88), rgba(11, 43, 36, 0));
}
.og-figure--wide { aspect-ratio: 21 / 9; }
.og-figure--tall { aspect-ratio: 3 / 4; }
.og-figure--square { aspect-ratio: 1 / 1; }

/* ---------- 7. 响应式 ---------- */
@media (min-width: 640px) {
  .og-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .og-foot__brand { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  body { padding-inline-start: var(--rail-w); }

  .og-skip { left: calc(var(--rail-w) + 12px); }

  .og-header {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, #15191b 0%, var(--carbon) 42%, var(--carbon-deep) 100%);
    overflow: hidden;
  }

  .og-header__bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 22px 18px 18px;
    background: transparent;
    border-bottom: 1px solid var(--line-soft);
  }

  .og-header__actions { display: none; }

  .og-brand__line { max-width: none; white-space: normal; }

  .og-nav {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    flex: 1 1 auto;
    gap: 14px;
    padding: 16px 12px 8px;
    background: transparent;
    transition: none;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .og-nav__list { border-top: 1px solid var(--line-soft); }

  .og-nav__link {
    grid-template-columns: 26px 1fr;
    gap: 8px;
    padding: 10px 8px 10px 10px;
    font-size: 14.5px;
    font-weight: 700;
  }

  .og-nav__foot { margin-top: 0; }

  .og-header__meta {
    display: block;
    padding: 14px 16px 22px;
    border-top: 1px solid var(--line-soft);
  }
  .og-header__meta .og-btn { margin-top: 12px; }

  .og-footer__grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 34px 30px; }
  .og-foot__brand { grid-column: auto; }
}

@media (min-width: 1280px) {
  .og-brand__name { font-size: 17px; }
  .og-foot__claim { font-size: 14.5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .og-progress__bar { transition: none; }
  .og-panel:hover,
  .og-btn:hover { transform: none; }
}