/* =========================================================
   新博体育 · NB88 — 共享样式 /assets/site.css
   深夜赛场指挥中心：深空底 + 精密网格 + 荧光青细线
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, dl, dd, figure, blockquote { margin: 0; padding: 0; }

ul, ol { 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; }

/* ---------- tokens ---------- */
:root {
  --c-void: #05070A;
  --c-panel: #0B1116;
  --c-raise: #131C22;
  --c-line: #1F2C33;
  --c-muted: #6E8492;
  --c-ink: #D6E6EC;
  --c-white: #F4FBFD;
  --c-cyan: #00E8CE;
  --c-cyan-dim: #0A8E82;
  --c-amber: #FFB13A;
  --c-coral: #FF6B5E;

  --bg: var(--c-void);
  --line: var(--c-line);
  --accent: var(--c-cyan);
  --accent-soft: rgba(0, 232, 206, 0.12);
  --accent-glow: rgba(0, 232, 206, 0.35);

  --font-display: "Oswald", "Barlow Condensed", "Arial Narrow",
    system-ui, -apple-system, "Noto Sans SC", "Source Han Sans SC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: system-ui, -apple-system, "Noto Sans SC", "Source Han Sans SC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Menlo", "Consolas",
    "Noto Sans Mono", monospace;

  --w-max: 1440px;
  --w-text: 72ch;
  --pad: 24px;
  --sp: 8px;
  --dur: 0.2s;
  --header-h: 76px;
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--c-void);
  background-image:
    linear-gradient(rgba(31, 44, 51, 0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 44, 51, 0.34) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: center top;
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 300;
  color: var(--c-white);
  line-height: 1.04;
  text-transform: uppercase;
}

h1 { font-size: clamp(48px, 8vw, 132px); letter-spacing: -0.02em; }
h2 { font-size: clamp(30px, 5vw, 62px); letter-spacing: -0.01em; }
h3 { font-size: clamp(19px, 2.3vw, 28px); letter-spacing: 0; }
h4 { font-size: 17px; font-weight: 500; color: var(--c-white); font-family: var(--font-body); }

p { max-width: var(--w-text); }

::selection { background: var(--c-cyan); color: #04110F; }

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

#main-content { display: block; padding-bottom: 96px; }

/* ---------- layout utilities ---------- */
.wrap {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.wrap--text { max-width: calc(var(--w-text) + var(--pad) * 2); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

.section { padding: 72px 0; border-top: 1px solid var(--c-line); }
.section--tight { padding: 40px 0; }
.section--wide { padding: 96px 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.section-head__title { margin: 0; }

.rule {
  border: 0;
  height: 1px;
  background: var(--c-line);
  margin: 0;
}

.rule--glow {
  background: linear-gradient(90deg, var(--c-cyan), rgba(0, 232, 206, 0) 70%);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ---------- typography helpers ---------- */
.index-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-muted);
  text-transform: uppercase;
}

.index-label::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--accent-glow);
}

.lead {
  max-width: 46ch;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.6;
  color: var(--c-white);
}

.prose { max-width: var(--w-text); font-size: 17px; line-height: 1.75; }
.prose p + p { margin-top: 1.1em; }
.prose a { color: var(--c-cyan); border-bottom: 1px solid rgba(0, 232, 206, 0.35); }
.prose strong { color: var(--c-white); font-weight: 500; }

.note {
  max-width: 30ch;
  padding-left: 14px;
  border-left: 1px solid var(--c-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--c-line);
  background: transparent;
  color: var(--c-ink);
  font-size: 13px;
  letter-spacing: 0.14em;
  line-height: 1;
  transition: color var(--dur) ease, border-color var(--dur) ease,
    background-color var(--dur) ease, box-shadow var(--dur) ease;
}

.btn:hover { color: var(--c-white); border-color: #33４a55; border-color: #2E4049; }

.btn--primary {
  border-color: var(--c-cyan-dim);
  color: var(--c-cyan);
  background: linear-gradient(180deg, rgba(0, 232, 206, 0.14), rgba(0, 232, 206, 0.02));
}

.btn--primary:hover {
  color: var(--c-white);
  box-shadow: 0 0 0 1px rgba(0, 232, 206, 0.45), 0 0 22px rgba(0, 232, 206, 0.18);
}

.btn--ghost { color: var(--c-muted); }
.btn--ghost:hover { color: var(--c-cyan); border-color: var(--c-cyan-dim); }

.btn--quiet {
  padding: 6px 0;
  border-color: transparent;
  color: var(--c-muted);
}
.btn--quiet:hover { color: var(--c-cyan); }

/* ---------- badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.badge--live { color: var(--c-coral); border-color: rgba(255, 107, 94, 0.45); }

.badge--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-coral);
  animation: nb-pulse 1.6s ease-in-out infinite;
}

.badge--score { color: var(--c-amber); border-color: rgba(255, 177, 58, 0.4); }

@keyframes nb-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

/* ---------- panels ---------- */
.panel {
  position: relative;
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(0, 232, 206, 0.05), rgba(0, 232, 206, 0) 42%);
}

.panel:hover {
  border-color: rgba(0, 232, 206, 0.45);
  box-shadow: inset 0 0 0 1px rgba(0, 232, 206, 0.08), 0 0 24px rgba(0, 232, 206, 0.08);
}

.panel--raised { background: var(--c-raise); }

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--c-line);
}

.panel__title {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-white);
}

.panel__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

/* ---------- stat ---------- */
.stat { display: flex; flex-direction: column; gap: 6px; }

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1;
  color: var(--c-white);
}

.stat__unit {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-muted);
}

.stat__label { font-size: 13px; color: var(--c-muted); }

.stat--score .stat__value {
  font-size: clamp(48px, 8vw, 96px);
  color: var(--c-amber);
}

/* ---------- data table ---------- */
.data-table {
  width: 100%;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
}

.data-table th {
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-line);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted);
  text-align: left;
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid rgba(31, 44, 51, 0.7);
  color: var(--c-ink);
}

.data-table tr:hover td { background: rgba(0, 232, 206, 0.04); }
.data-table .num { color: var(--c-white); }

/* ---------- tags / filters ---------- */
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  padding: 7px 14px;
  border: 1px solid var(--c-line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  transition: color var(--dur) ease, border-color var(--dur) ease,
    background-color var(--dur) ease;
}

.tag:hover { color: var(--c-ink); border-color: #2E4049; }

.tag[aria-pressed="true"],
.tag.is-active {
  color: var(--c-void);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

.filter-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

/* ---------- accordion ---------- */
.accordion { border-top: 1px solid var(--c-line); }
.accordion__item { border-bottom: 1px solid var(--c-line); }

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 4px;
  font-size: 17px;
  text-align: left;
  color: var(--c-white);
  transition: color var(--dur) ease;
}

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

.accordion__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--c-cyan);
  transition: transform var(--dur) ease;
}

.accordion__trigger[aria-expanded="true"] .accordion__mark { transform: rotate(90deg); }

.accordion__panel {
  max-height: 0;
  overflow: hidden;
  padding: 0 4px;
  opacity: 0;
  transition: max-height var(--dur) ease, opacity var(--dur) ease, padding var(--dur) ease;
}

.accordion__panel[data-open] { opacity: 1; padding-bottom: 22px; }

.accordion__item[data-read="true"] .accordion__trigger { color: var(--c-muted); }
.accordion__item[data-read="true"] .accordion__mark { color: var(--c-cyan-dim); }

/* ---------- tabs ---------- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--c-line);
}

.tab {
  margin-bottom: -1px;
  padding: 11px 16px;
  border-bottom: 1px solid transparent;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

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

.tab[aria-selected="true"] {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
  box-shadow: 0 1px 12px -4px var(--accent-glow);
}

.tab-panel { padding-top: 20px; }
.tab-panel[hidden] { display: none; }

/* ---------- anchor index ---------- */
.anchor-index { position: sticky; top: 100px; }

.anchor-index__list {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--c-line);
}

.anchor-index__link {
  position: relative;
  display: block;
  padding: 8px 0 8px 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  transition: color var(--dur) ease;
}

.anchor-index__link:hover { color: var(--c-ink); }
.anchor-index__link[aria-current="true"] { color: var(--c-cyan); }

.anchor-index__link[aria-current="true"]::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--c-cyan);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ---------- media frame ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.06) brightness(0.92);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 232, 206, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 232, 206, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.75;
}

.media-frame--empty {
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(31, 44, 51, 0.9) 0 1px,
    transparent 1px 12px
  );
}

.media-frame--hero { aspect-ratio: 21 / 9; }
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 8px 12px;
  border-top: 1px solid var(--c-line);
  background: rgba(5, 7, 10, 0.84);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.media-frame__index {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  padding: 6px 10px;
  background: rgba(5, 7, 10, 0.84);
  border-left: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

/* ---------- reveal ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---------- to top ---------- */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-line);
  background: rgba(11, 17, 22, 0.92);
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) ease, transform var(--dur) ease,
    visibility var(--dur) ease, border-color var(--dur) ease;
}

.to-top.is-on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--c-cyan-dim); }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 8px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--c-cyan);
  color: #04110F;
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: top var(--dur) ease;
}

.skip-link:focus { top: 8px; }

/* =========================================================
   HEADER — 框架式导航
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(5, 7, 10, 0.97), rgba(5, 7, 10, 0.84));
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--c-ink);
}

/* 左侧竖线：自顶向下延伸的页面边框 */
.site-header::after {
  content: "";
  position: absolute;
  left: max(12px, calc((100vw - var(--w-max)) / 2));
  top: 100%;
  width: 1px;
  height: 40vh;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(0, 232, 206, 0.55),
    rgba(0, 232, 206, 0.06) 70%,
    rgba(0, 232, 206, 0)
  );
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: var(--w-max);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0 var(--pad);
  transition: min-height var(--dur) ease;
}

.site-header.is-condensed .header-inner { min-height: 56px; }

/* 顶线进度条 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-cyan-dim), var(--c-cyan));
  box-shadow: 0 0 10px var(--accent-glow);
  transition: width 0.1s linear;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand__mark {
  padding: 4px 7px;
  border: 1px solid var(--c-cyan-dim);
  background: rgba(0, 232, 206, 0.06);
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.1em;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.16em;
  color: var(--c-white);
  text-transform: uppercase;
  transition: opacity var(--dur) ease;
}

.site-header.is-condensed .brand__name { opacity: 0.72; }

/* 导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 30px);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-muted);
  transition: color var(--dur) ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: transparent;
  transition: background var(--dur) ease;
}

.site-nav__link:hover { color: var(--c-white); }

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

.site-nav__link[aria-current="page"]::after {
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* 头部 CTA */
.nav-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--c-cyan-dim);
  background: linear-gradient(180deg, rgba(0, 232, 206, 0.12), rgba(0, 232, 206, 0.02));
  color: var(--c-cyan);
  font-size: 12px;
  letter-spacing: 0.14em;
  line-height: 1;
  transition: background-color var(--dur) ease, box-shadow var(--dur) ease,
    color var(--dur) ease;
}

.nav-cta:hover {
  color: var(--c-white);
  background-color: rgba(0, 232, 206, 0.2);
  box-shadow: 0 0 0 1px rgba(0, 232, 206, 0.4), 0 0 18px rgba(0, 232, 206, 0.18);
}

/* 移动导航按钮 */
.nav-toggle {
  position: relative;
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 36px;
  border: 1px solid var(--c-line);
  transition: border-color var(--dur) ease;
}

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

.nav-toggle__bar {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 1px;
  background: var(--c-ink);
  transition: transform var(--dur) ease, opacity var(--dur) ease,
    background-color var(--dur) ease;
}

.nav-toggle__bar:nth-child(1) { top: 13px; }
.nav-toggle__bar:nth-child(2) { top: 18px; }
.nav-toggle__bar:nth-child(3) { top: 23px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: var(--c-cyan); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  position: relative;
  border-top: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(11, 17, 22, 0.72), var(--c-void) 60%);
  color: var(--c-ink);
}

.footer-inner {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 64px var(--pad) 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 0.9fr) minmax(0, 1.2fr);
  gap: 40px 24px;
}

.footer-brand { max-width: 34ch; }

.footer-brand__mark {
  display: inline-block;
  padding: 4px 7px;
  border: 1px solid var(--c-cyan-dim);
  background: rgba(0, 232, 206, 0.06);
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.1em;
}

.footer-brand__name {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.12em;
  color: var(--c-white);
  text-transform: uppercase;
}

.footer-brand__lede {
  margin-top: 12px;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--c-cyan);
}

.footer-list { display: flex; flex-direction: column; gap: 10px; }

.footer-list--data { gap: 12px; }

.footer-list--data .footer-list__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--c-muted);
  transition: color var(--dur) ease;
}

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

.footer-link--strong {
  margin-top: 16px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.footer-link--strong:hover { color: var(--c-cyan); border-bottom-color: var(--c-cyan-dim); }

.footer-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.footer-val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink);
  word-break: break-word;
}

.footer-note {
  margin-top: 14px;
  max-width: 26ch;
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 28px;
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.footer-base__item { max-width: none; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1024px) {
  :root { --pad: 20px; }

  .site-header::after { display: none; }

  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .grid-12 > * { grid-column: span 8; }

  .footer-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px 24px;
  }

  .footer-brand { grid-column: 1 / -1; max-width: none; }
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    padding: 8px var(--pad) 20px;
    border-bottom: 1px solid var(--c-line);
    background: rgba(9, 13, 17, 0.98);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--dur) ease, transform var(--dur) ease,
      visibility var(--dur) ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item { border-bottom: 1px solid var(--c-line); }
  .site-nav__item:last-child { border-bottom: 0; }

  .site-nav__link {
    display: block;
    padding: 14px 2px;
    font-size: 14px;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    box-shadow: inset 2px 0 0 var(--c-cyan);
    padding-left: 12px;
  }

  .header-inner { gap: 16px; }
}

@media (max-width: 720px) {
  .nav-cta { display: none; }
  .section { padding: 56px 0; }
  .section--wide { padding: 64px 0; }
  #main-content { padding-bottom: 64px; }
}

@media (max-width: 640px) {
  :root { --pad: 16px; }

  .grid-12 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
  .grid-12 > * { grid-column: span 4; }

  .footer-top { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .footer-inner { padding: 48px var(--pad) 24px; }
  .footer-base { flex-direction: column; align-items: flex-start; }

  .anchor-index { position: static; }
  .accordion__trigger { font-size: 16px; }
}

/* =========================================================
   MOTION SAFETY
   ========================================================= */
@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;
  }

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

  .scroll-progress { transition: none; }
}