/* =========================================================
   score-oety.com.cn — 共享外壳样式
   深空蓝基底 / 荧光青主强调 / 炽橙警示 / 纸感叠层
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  --c-base: #0A1626;
  --c-deep: #12233A;
  --c-steel: #1C3350;
  --c-line: #2E4A6B;
  --c-paper: #EDE8DF;
  --c-ink: #F4F7FA;
  --c-muted: #A9B6C6;
  --c-cyan: #34E7D2;
  --c-cyan-deep: #12897F;
  --c-orange: #FF7A3C;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", "Roboto Mono",
    Menlo, Consolas, "Liberation Mono", monospace;

  --rail-w: 88px;
  --strip-h: 56px;
  --gutter: clamp(20px, 3.6vw, 56px);
  --maxw: 1240px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.24s;

  --z-rail: 65;
  --z-strip: 70;
  --z-header: 80;
  --z-skip: 200;
}

@media (min-width: 901px) {
  html[data-condensed] { --strip-h: 40px; }
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

html[data-nav-open] { overflow: hidden; }

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

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

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

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

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

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

::selection {
  background: var(--c-cyan);
  color: #04211F;
}

/* ---------- 3. Base ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
  background-color: var(--c-base);
  background-image:
    radial-gradient(circle at 84% 4%, rgba(52, 231, 210, 0.075), transparent 46%),
    radial-gradient(circle at 4% 96%, rgba(255, 122, 60, 0.055), transparent 42%),
    linear-gradient(180deg, #0A1626 0%, #0a1421 62%, #0A1626 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.012em;
  color: var(--c-ink);
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 4.6vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.15rem); }
h3 { font-size: clamp(1.12rem, 1.7vw, 1.4rem); }

main {
  padding-top: 56px;
  padding-left: var(--rail-w);
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  left: var(--gutter);
  top: 10px;
  z-index: var(--z-skip);
  transform: translateY(-180%);
  display: inline-block;
  padding: 10px 18px;
  background: var(--c-cyan);
  color: #04211F;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid #0A3B36;
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 2px;
}

/* ---------- 5. Header shell ---------- */
.site-header {
  position: relative;
  z-index: var(--z-header);
}

/* 5.1 顶部悬浮数据条 */
.data-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-strip);
  height: var(--strip-h);
  background: linear-gradient(
    90deg,
    rgba(10, 22, 38, 0.98) 0%,
    rgba(18, 35, 58, 0.97) 58%,
    rgba(10, 22, 38, 0.98) 100%
  );
  border-bottom: 1px solid var(--c-line);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: height var(--dur) var(--ease);
}

.data-strip::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--c-cyan) 0%, transparent 42%, var(--c-orange) 100%);
  opacity: 0.72;
  pointer-events: none;
}

.data-strip__inner {
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  padding-left: calc(var(--rail-w) + var(--gutter));
  padding-right: var(--gutter);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding-right: clamp(10px, 1.4vw, 18px);
  border-right: 1px solid var(--c-line);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  flex: 0 0 auto;
  background: var(--c-cyan);
  color: #04211F;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--c-ink);
  white-space: nowrap;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  color: var(--c-muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.data-strip__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.data-strip__round {
  color: var(--c-cyan);
  font-weight: 700;
}

.data-strip__sep {
  color: var(--c-line);
}

.data-strip__note {
  color: var(--c-muted);
  overflow: hidden;
  text-overflow: ellipsis;
}

.data-strip__quick {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.data-strip__link {
  display: inline-block;
  padding: 6px 13px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-ink);
  border: 1px solid var(--c-line);
  background: rgba(28, 51, 80, 0.58);
  white-space: nowrap;
  transition: background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.data-strip__link:hover {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: #04211F;
}

.data-strip__link:last-child:hover {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: #20100A;
}

/* 5.2 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 7px 10px;
  border: 1px solid var(--c-line);
  background: rgba(28, 51, 80, 0.72);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
  flex: 0 0 auto;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { top: 8px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 4px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 4px;
  transform: rotate(-45deg);
}

/* 5.3 侧边轨道导航 */
.rail-nav {
  position: fixed;
  top: var(--strip-h);
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: var(--z-rail);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 18px 0 16px;
  background: linear-gradient(180deg, rgba(18, 35, 58, 0.96) 0%, rgba(10, 22, 38, 0.99) 100%);
  border-right: 1px solid var(--c-line);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  transition: top var(--dur) var(--ease);
}

.rail-nav::-webkit-scrollbar { display: none; }

.rail-nav__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 100%;
}

.rail-nav__item { width: 100%; }

.rail-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 11px 4px 15px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.25;
  text-align: center;
  color: var(--c-muted);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.rail-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 5px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: transparent;
  transform: translateX(-50%);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.rail-nav__link:hover {
  color: var(--c-ink);
  background: rgba(28, 51, 80, 0.6);
}

.rail-nav__link[aria-current="page"] {
  color: var(--c-cyan);
  background: rgba(52, 231, 210, 0.09);
}

.rail-nav__link[aria-current="page"]::after {
  background: var(--c-cyan);
  box-shadow: 0 0 10px rgba(52, 231, 210, 0.85);
}

.rail-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: #5A7796;
  transition: color var(--dur) var(--ease);
}

.rail-nav__link[aria-current="page"] .rail-nav__idx { color: var(--c-cyan); }

.rail-nav__label { display: block; }

.rail-nav__stamp {
  margin-top: auto;
  padding-top: 22px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.3em;
  color: #3E5A79;
  white-space: nowrap;
}

/* ---------- 6. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  padding-left: var(--rail-w);
  background: linear-gradient(180deg, #12233A 0%, #0d1c2e 55%, #0A1626 100%);
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: 14px;
}

.site-footer__bevel {
  height: clamp(20px, 3vw, 34px);
  background: linear-gradient(90deg, var(--c-cyan-deep) 0%, var(--c-steel) 44%, #0d1c2e 100%);
  clip-path: polygon(0 0, 100% 0, 100% 32%, 0 100%);
  opacity: 0.86;
}

.site-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(30px, 4.6vw, 60px) var(--gutter) clamp(20px, 3vw, 34px);
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  gap: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--c-line);
}

.site-footer__brand-name {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  color: var(--c-ink);
}

.site-footer__brand-line {
  margin-top: 10px;
  max-width: 24em;
  line-height: 1.72;
  color: var(--c-muted);
  font-size: 13.5px;
}

.site-footer__stamp {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: #4A6B8C;
}

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 32px);
}

.foot-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
  padding-bottom: 11px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--c-line);
}

.foot-col__list li + li { margin-top: 9px; }

.foot-col__link {
  font-size: 13.5px;
  color: #CBD6E2;
  transition: color var(--dur) var(--ease);
}

.foot-col__link:hover { color: var(--c-cyan); }

.site-footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
  gap: 18px 28px;
  padding: clamp(22px, 3.4vw, 36px) 0;
  border-bottom: 1px solid var(--c-line);
}

.contact-line {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.contact-line__k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: #6E89A6;
}

.contact-line__v {
  color: var(--c-ink);
  font-size: 13.5px;
  font-weight: 600;
  word-break: break-word;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px 24px;
  padding-top: clamp(16px, 2.4vw, 24px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: #7A93AF;
}

.site-footer__copy { white-space: nowrap; }
.site-footer__icp { max-width: 46em; }

/* ---------- 7. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--wide { max-width: 1440px; }

.section { padding-block: clamp(44px, 7vw, 96px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  padding-bottom: 14px;
  margin-bottom: clamp(24px, 4vw, 40px);
  border-bottom: 1px solid var(--c-line);
}

.section__index {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  font-weight: 600;
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.02em;
}

.section__title {
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 800;
  color: var(--c-ink);
}

.section__lead {
  flex-basis: 100%;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.divider {
  height: 0;
  border: 0;
  border-top: 1px solid var(--c-line);
  margin-block: clamp(32px, 5vw, 64px);
}

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

/* ---------- 8. Text ---------- */
.prose {
  max-width: 36em;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: #DCE4EC;
}

.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.7em; margin-bottom: 0.55em; }

.prose ul { margin-top: 1em; }

.prose li {
  position: relative;
  padding-left: 18px;
  margin-top: 0.5em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--c-cyan);
}

.prose a {
  color: var(--c-cyan);
  border-bottom: 1px solid var(--c-cyan-deep);
}

/* ---------- 9. Components ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--c-ink);
  background: var(--c-steel);
  border: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:hover {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: #04211F;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: #04211F;
}

.btn--primary:hover {
  background: #7FF4E6;
  border-color: #7FF4E6;
}

.btn--ghost {
  background: transparent;
  color: var(--c-cyan);
  border-color: var(--c-cyan-deep);
}

.btn--ghost:hover {
  background: rgba(52, 231, 210, 0.12);
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
  background: rgba(52, 231, 210, 0.08);
  border: 1px solid var(--c-cyan-deep);
}

.tag--alert {
  color: var(--c-orange);
  background: rgba(255, 122, 60, 0.09);
  border-color: var(--c-orange);
}

.tag--paper {
  color: #0A1626;
  background: var(--c-paper);
  border-color: #C7BFB2;
}

.paper {
  background: var(--c-paper);
  color: #0A1626;
  border: 1px solid #C7BFB2;
  padding: clamp(18px, 2.4vw, 28px);
  box-shadow: 6px 6px 0 rgba(28, 51, 80, 0.55);
}

.card {
  position: relative;
  background: var(--c-deep);
  border: 1px solid var(--c-line);
  padding: clamp(18px, 2.2vw, 26px);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.card:hover {
  background: var(--c-steel);
  border-color: var(--c-cyan-deep);
}

.card__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.card__title {
  margin-top: 10px;
  font-size: clamp(1.02rem, 1.5vw, 1.25rem);
  font-weight: 800;
  line-height: 1.3;
}

.card__meta {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.stat__unit {
  margin-left: 4px;
  font-size: 0.42em;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.stat__label {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.stat--alert .stat__value { color: var(--c-orange); }

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__link {
  color: var(--c-muted);
  transition: color var(--dur) var(--ease);
}

.breadcrumbs__link:hover { color: var(--c-cyan); }

.breadcrumbs__sep { color: var(--c-line); }

.breadcrumbs__current { color: var(--c-ink); }

/* 分段切换 */
.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  background: var(--c-deep);
  border: 1px solid var(--c-line);
}

.segmented__tab {
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
  border-right: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.segmented__tab:last-child { border-right: 0; }
.segmented__tab:hover { color: var(--c-ink); background: rgba(28, 51, 80, 0.7); }

.segmented__tab[aria-selected="true"] {
  background: var(--c-cyan);
  color: #04211F;
  font-weight: 700;
}

.panel { padding-top: clamp(20px, 3vw, 32px); }
.panel[hidden] { display: none; }

/* 图片容器基础规则（页面阶段放 img 或占位） */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(160deg, var(--c-steel) 0%, var(--c-base) 74%);
  border: 1px solid var(--c-line);
}

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 74, 107, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 74, 107, 0.35) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.5;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

/* ---------- 10. Motion helpers ---------- */
[data-reveal] { will-change: opacity, transform; }

html[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

html[data-reveal-ready] [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 11. Responsive ---------- */
@media (max-width: 1100px) {
  .site-footer__top { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  :root { --rail-w: 0px; }

  main { padding-left: 0; }

  .data-strip__inner { padding-left: var(--gutter); }
  .brand__sub { display: none; }
  .data-strip__note { display: none; }

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

  .rail-nav {
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    align-items: stretch;
    gap: 0;
    padding: calc(var(--strip-h) + 26px) var(--gutter) 40px;
    background: rgba(10, 22, 38, 0.99);
    border-right: 0;
    border-top: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s var(--ease), transform 0.26s var(--ease),
      visibility 0s linear 0.26s;
  }

  .rail-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity 0.2s var(--ease), transform 0.26s var(--ease),
      visibility 0s linear 0s;
  }

  .rail-nav__list {
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .rail-nav__item {
    width: 100%;
    border-bottom: 1px solid var(--c-line);
  }

  .rail-nav__item:first-child { border-top: 1px solid var(--c-line); }

  .rail-nav__link {
    flex-direction: row;
    align-items: baseline;
    justify-content: flex-start;
    gap: 16px;
    width: 100%;
    padding: 18px 2px;
    font-size: clamp(1.05rem, 4.6vw, 1.35rem);
    letter-spacing: 0.04em;
    text-align: left;
  }

  .rail-nav__link::after {
    left: auto;
    right: 4px;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
  }

  .rail-nav__stamp { display: none; }

  .site-footer { padding-left: 0; }

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

  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  body { font-size: 15.5px; }

  .brand__text { display: none; }
  .brand { padding-right: 10px; }

  .data-strip__link {
    padding: 5px 9px;
    font-size: 11.5px;
  }

  .data-strip__meta { font-size: 11px; letter-spacing: 0.04em; }

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

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

  .grid--12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .segmented { width: 100%; }
  .segmented__tab { flex: 1 1 auto; text-align: center; padding: 10px 12px; }
}

@media (max-width: 400px) {
  .data-strip__quick { display: none; }
}

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

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

  html[data-reveal-ready] [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .rail-nav { transition: none; }
}