/* =========================================================
   安博电竞站 · 共享样式 /assets/site.css
   夜场赛事控制台：深墨底 + 电光青 + 暖纸标签
   ========================================================= */

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

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

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

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

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

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

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

/* ---------- Tokens ---------- */
:root {
  --ink-900: #0B1018;
  --ink-800: #101822;
  --ink-700: #141C28;
  --ink-600: #1B2534;

  --cyan: #35E0D6;
  --violet: #8C6BFF;
  --orange: #FF5A3C;
  --yellow: #FFD247;
  --green: #4CD97B;

  --paper: #F3E9D8;
  --paper-ink: #1A1613;
  --mist: #8A94A6;

  --text-strong: #F2EDE2;
  --text: #C9D3E0;
  --text-dim: #8A94A6;

  --line: rgba(138, 148, 166, 0.22);
  --line-strong: rgba(138, 148, 166, 0.44);

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

  --shell: 1280px;
  --gutter: 20px;
  --rail-w: 300px;
  --radius: 3px;
  --shadow-lift: 0 18px 34px -22px rgba(0, 0, 0, 0.95);
  --header-h: 68px;
}

@media (min-width: 768px) { :root { --gutter: 28px; } }
@media (min-width: 1200px) { :root { --gutter: 40px; } }

/* ---------- Base ---------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(rgba(138, 148, 166, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 148, 166, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  color: var(--text-strong);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(28px, 4.6vw, 54px); }
h2 { font-size: clamp(22px, 3.2vw, 34px); }
h3 { font-size: clamp(18px, 2.2vw, 22px); }
h4 { font-size: 17px; }

::selection {
  background: var(--cyan);
  color: var(--ink-900);
}

#main-content { scroll-margin-top: 110px; }

/* ---------- Focus ---------- */
:focus { outline: none; }

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

/* ---------- Utilities ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.u-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-main {
  padding-block: 36px 72px;
}

/* ---------- Skip link ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--paper);
  color: var(--paper-ink);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  border-radius: 2px;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.6);
  transition: top 0.18s ease;
}

.skip-link:focus-visible {
  top: 14px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(16, 24, 34, 0.98), rgba(11, 16, 24, 0.98));
  border-bottom: 1px solid var(--line);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  z-index: 3;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--orange));
  transform: scaleX(var(--sp, 0));
  transform-origin: 0 50%;
  pointer-events: none;
}

.header-bar {
  border-bottom: 1px solid var(--line);
  background: rgba(16, 24, 34, 0.86);
}

.header-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: var(--header-h);
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  flex: 0 0 auto;
}

.brand__mark {
  display: grid;
  grid-template-columns: repeat(3, 5px);
  align-items: end;
  gap: 3px;
  width: 21px;
  height: 26px;
}

.brand__mark-line {
  display: block;
  width: 5px;
  border-radius: 1px;
  background: var(--cyan);
  transition: transform 0.2s ease;
}

.brand__mark-line:nth-child(1) { height: 12px; background: var(--orange); }
.brand__mark-line:nth-child(2) { height: 26px; background: var(--cyan); }
.brand__mark-line:nth-child(3) { height: 18px; background: var(--violet); }

.brand:hover .brand__mark-line:nth-child(1) { transform: scaleY(1.2); transform-origin: bottom; }
.brand:hover .brand__mark-line:nth-child(2) { transform: scaleY(0.82); transform-origin: bottom; }
.brand:hover .brand__mark-line:nth-child(3) { transform: scaleY(1.12); transform-origin: bottom; }

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

.brand__name {
  color: var(--text-strong);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.brand__meta {
  margin-top: 3px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
}

/* Version stamp (paper label) */
.version-stamp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: 2px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.55);
  transform: rotate(-1.2deg);
  flex: 0 0 auto;
}

.version-stamp__label {
  font-size: 11px;
  opacity: 0.62;
}

.version-stamp__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

/* Primary nav */
.primary-nav { margin-left: auto; }

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

.primary-nav__item { position: relative; }

.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--text);
  font-size: 14.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}

.primary-nav__link:hover {
  color: var(--text-strong);
  background: var(--ink-700);
  border-color: var(--line);
}

.primary-nav__link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(53, 224, 214, 0.09);
  border-color: rgba(53, 224, 214, 0.38);
}

.primary-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--cyan);
}

/* Nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 12px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
  font-size: 13px;
  letter-spacing: 0.08em;
  flex: 0 0 auto;
}

.nav-toggle:hover { border-color: var(--line-strong); color: var(--text-strong); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 12px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.nav-toggle[aria-expanded="true"] { color: var(--cyan); border-color: rgba(53, 224, 214, 0.45); }
.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); }

/* Zone rail */
.zone-rail {
  position: relative;
  background: var(--ink-900);
}

.zone-rail::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(138, 148, 166, 0.07) 0 1px, transparent 1px 48px);
  pointer-events: none;
}

.zone-rail__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 54px;
}

.zone-rail__label {
  flex: 0 0 auto;
  color: var(--text-dim);
  font-size: 12px;
  letter-spacing: 0.18em;
  white-space: nowrap;
  padding-right: 14px;
  border-right: 1px solid var(--line);
}

.zone-rail__label::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  background: var(--cyan);
  transform: rotate(45deg) translateY(-1px);
}

.zone-rail__list {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 auto;
  min-width: 0;
  padding: 7px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.zone-rail__list::-webkit-scrollbar { display: none; }

.zone-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
  font-size: 13.5px;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.zone-chip:hover {
  transform: translateY(-2px);
  border-color: rgba(53, 224, 214, 0.5);
  color: var(--text-strong);
}

.zone-chip[aria-pressed="true"] {
  background: rgba(53, 224, 214, 0.12);
  border-color: var(--cyan);
  color: var(--text-strong);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.zone-chip__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mist);
  box-shadow: 0 0 0 3px rgba(138, 148, 166, 0.16);
}

.zone-chip__dot[data-state="live"] {
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(76, 217, 123, 0.18);
  animation: dot-pulse 2.8s ease-in-out infinite;
}

.zone-chip__dot[data-state="warm"] {
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 60, 0.18);
}

.zone-chip__dot[data-state="idle"] {
  background: var(--mist);
}

.zone-chip__name { font-weight: 500; }

.zone-chip__count {
  padding-left: 8px;
  border-left: 1px solid var(--line);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}

.zone-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px dashed rgba(53, 224, 214, 0.42);
  border-radius: 2px;
  color: var(--cyan);
  font-size: 13px;
  white-space: nowrap;
  transition: background-color 0.16s ease, border-color 0.16s ease;
}

.zone-rail__link:hover {
  background: rgba(53, 224, 214, 0.1);
  border-color: var(--cyan);
}

.zone-rail__link-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}

/* ---------- Layout systems ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.split__rail { min-width: 0; }
.split__main { min-width: 0; }

@media (min-width: 1024px) {
  .split {
    grid-template-columns: minmax(240px, var(--rail-w)) minmax(0, 1fr);
    gap: 56px;
  }
  .split--wide { grid-template-columns: minmax(260px, 380px) minmax(0, 1fr); }
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(330px, 100%), 1fr)); }
.grid--tight { gap: 10px; }

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-gap, 18px);
}

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

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 22px;
}

.section-head__title {
  font-size: clamp(21px, 3vw, 31px);
}

.section-head__desc {
  max-width: 46ch;
  color: var(--text-dim);
  font-size: 14px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text-strong);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease, color 0.16s ease;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: 0 8px 0 -3px rgba(53, 224, 214, 0.28);
}

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #06231f;
  font-weight: 700;
}

.btn--primary:hover {
  background: #51f1e7;
  box-shadow: 0 9px 0 -3px rgba(53, 224, 214, 0.32);
}

.btn--paper {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--paper-ink);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.45);
}

.btn--paper:hover {
  transform: translateY(-3px);
  box-shadow: 4px 6px 0 rgba(0, 0, 0, 0.45);
}

.btn--ghost { background: transparent; }

.btn--sm {
  padding: 7px 13px;
  font-size: 13px;
}

/* ---------- Labels & status ---------- */
.label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.label--paper { background: var(--paper); border-color: var(--paper); color: var(--paper-ink); box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.4); }
.label--cyan { background: rgba(53, 224, 214, 0.1); border-color: rgba(53, 224, 214, 0.45); color: var(--cyan); }
.label--violet { background: rgba(140, 107, 255, 0.12); border-color: rgba(140, 107, 255, 0.45); color: #B9A4FF; }
.label--orange { background: rgba(255, 90, 60, 0.12); border-color: rgba(255, 90, 60, 0.45); color: #FF8B74; }
.label--yellow { background: rgba(255, 210, 71, 0.12); border-color: rgba(255, 210, 71, 0.45); color: var(--yellow); }
.label--green { background: rgba(76, 217, 123, 0.12); border-color: rgba(76, 217, 123, 0.45); color: var(--green); }

.status-dot {
  flex: 0 0 auto;
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mist);
  box-shadow: 0 0 0 3px rgba(138, 148, 166, 0.16);
}

.status-dot[data-state="live"] { background: var(--green); box-shadow: 0 0 0 3px rgba(76, 217, 123, 0.18); }
.status-dot[data-state="warm"] { background: var(--orange); box-shadow: 0 0 0 3px rgba(255, 90, 60, 0.18); }
.status-dot[data-state="idle"] { background: var(--mist); }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 12.5px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "›";
  margin: 0 9px;
  color: var(--line-strong);
}

.breadcrumb__link {
  font-family: var(--font-mono);
  transition: color 0.16s ease;
}

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

.breadcrumb__link[aria-current="page"] {
  color: var(--text-strong);
}

/* ---------- Prose ---------- */
.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  margin-top: 1.9em;
  margin-bottom: 0.6em;
}

.prose h2 { font-size: clamp(21px, 2.6vw, 26px); }
.prose h3 { font-size: 18px; }

.prose ul,
.prose ol {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
}

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

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.prose strong {
  color: var(--text-strong);
  font-weight: 500;
}

.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(53, 224, 214, 0.4);
  transition: border-color 0.16s ease;
}

.prose a:hover { border-bottom-color: var(--cyan); }

.prose blockquote {
  padding: 14px 18px;
  border-left: 2px solid var(--violet);
  background: var(--ink-700);
  color: var(--text);
}

/* ---------- Panels & cards ---------- */
.panel {
  position: relative;
  padding: 22px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel--flush { padding: 0; overflow: hidden; }

.panel--paper {
  background: var(--paper);
  border-color: #D9CBB4;
  color: var(--paper-ink);
}

.panel--paper h2,
.panel--paper h3,
.panel--paper .panel__title { color: var(--paper-ink); }

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.panel__title {
  font-size: 17px;
  font-weight: 900;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(53, 224, 214, 0.5);
  box-shadow: var(--shadow-lift);
}

.card:hover::after,
.card:focus-within::after { opacity: 1; }

.card__title {
  font-size: 17px;
  font-weight: 900;
  color: var(--text-strong);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

/* ---------- Legend ---------- */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 12px 14px;
  background: rgba(20, 28, 40, 0.6);
  border: 1px dashed var(--line-strong);
  border-radius: 2px;
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.legend__swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--mist);
}

.legend__swatch[data-tone="cyan"] { background: var(--cyan); }
.legend__swatch[data-tone="violet"] { background: var(--violet); }
.legend__swatch[data-tone="orange"] { background: var(--orange); }
.legend__swatch[data-tone="yellow"] { background: var(--yellow); }
.legend__swatch[data-tone="green"] { background: var(--green); }
.legend__swatch[data-tone="paper"] { background: var(--paper); }

/* ---------- Dense index ---------- */
.index {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.index__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 16px;
  padding: 14px 16px 14px 14px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: background-color 0.16s ease, border-color 0.16s ease;
}

.index__row:hover {
  background: rgba(53, 224, 214, 0.06);
  border-left-color: var(--cyan);
}

.index__num {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.index__title {
  min-width: 0;
  color: var(--text-strong);
  font-size: 15px;
  font-weight: 500;
}

.index__meta {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* ---------- Media frames ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--ink-600);
  background-image:
    linear-gradient(rgba(138, 148, 166, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 148, 166, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
}

.media-frame img,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(11, 16, 24, 0.16) 0 1px, transparent 1px 4px),
    linear-gradient(180deg, transparent 52%, rgba(11, 16, 24, 0.62));
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 7px 12px;
  background: var(--paper);
  color: var(--paper-ink);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.media-frame__tag {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
}

/* ---------- 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;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 40%, var(--orange) 72%, var(--yellow));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding-block: 56px 34px;
}

.footer-col { min-width: 0; }

.footer-brand {
  color: var(--text-strong);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.footer-line {
  max-width: 34ch;
  margin-top: 10px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.75;
}

.footer-line--small {
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 12.5px;
}

.footer-stamp {
  display: inline-block;
  margin-top: 18px;
  padding: 4px 10px;
  background: rgba(243, 233, 216, 0.08);
  border: 1px solid rgba(243, 233, 216, 0.28);
  border-radius: 2px;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.footer-heading {
  position: relative;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 32px;
  height: 1px;
  background: var(--cyan);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-list__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 0;
  color: var(--text);
  font-size: 14px;
  transition: color 0.16s ease, transform 0.16s ease;
}

.footer-list__link::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background: var(--text-dim);
  opacity: 0.6;
  transition: background-color 0.16s ease, opacity 0.16s ease;
}

.footer-list__link:hover {
  color: var(--cyan);
  transform: translateX(3px);
}

.footer-list__link:hover::before { background: var(--cyan); opacity: 1; }

.footer-list__link[aria-current="page"] { color: var(--cyan); }
.footer-list__link[aria-current="page"]::before { background: var(--cyan); opacity: 1; }

.footer-list__link[data-zone-mark="southwest"]::before { background: var(--cyan); }
.footer-list__link[data-zone-mark="east"]::before { background: var(--violet); }
.footer-list__link[data-zone-mark="north"]::before { background: var(--orange); }
.footer-list__link[data-zone-mark="south"]::before { background: var(--yellow); }
.footer-list__link[data-zone-mark="northeast"]::before { background: var(--green); }
.footer-list__link[data-zone-mark="overseas"]::before { background: var(--mist); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
}

.footer-contact__key {
  flex: 0 0 auto;
  min-width: 60px;
  color: var(--text-dim);
  font-size: 11.5px;
  letter-spacing: 0.14em;
}

.footer-contact__val {
  color: var(--text-strong);
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.copy-btn {
  padding: 3px 9px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text-dim);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.copy-btn:hover {
  color: var(--cyan);
  border-color: rgba(53, 224, 214, 0.5);
}

.copy-btn[data-copied="true"] {
  color: var(--green);
  border-color: rgba(76, 217, 123, 0.5);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  background: var(--ink-900);
}

.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding-block: 18px;
}

.footer-legal-line {
  color: var(--text-dim);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.footer-legal-line--muted { opacity: 0.82; }

/* ---------- Responsive: tablet & mobile ---------- */
@media (max-width: 1100px) {
  .primary-nav__link { padding: 9px 8px; font-size: 13.5px; }
  .brand__meta { display: none; }
}

@media (max-width: 900px) {
  :root { --header-h: 62px; }

  body { padding-bottom: 76px; }

  .header-bar__inner { gap: 12px; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin: 0;
    padding: 12px var(--gutter) 18px;
    background: var(--ink-800);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 26px 42px -20px rgba(0, 0, 0, 0.92);
  }

  .site-header[data-open] .primary-nav { display: block; }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    counter-reset: nav-index;
  }

  .primary-nav__item { counter-increment: nav-index; }

  .primary-nav__link {
    display: flex;
    align-items: center;
    padding: 12px 10px;
    font-size: 15.5px;
    border-bottom: 1px solid var(--line);
  }

  .primary-nav__link::before {
    content: counter(nav-index, decimal-leading-zero);
    margin-right: 12px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .primary-nav__link[aria-current="page"]::after { display: none; }

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

  .version-stamp { display: none; }

  .zone-rail {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    background: var(--ink-800);
    border-top: 1px solid var(--line);
    box-shadow: 0 -14px 30px -18px rgba(0, 0, 0, 0.95);
  }

  .zone-rail__inner {
    gap: 8px;
    min-height: 60px;
    padding-inline: 12px;
  }

  .zone-rail__label { display: none; }

  .zone-chip { padding: 6px 10px; font-size: 13px; }

  .zone-rail__link {
    padding: 6px 8px;
    font-size: 12px;
  }

  .scroll-progress { bottom: auto; top: calc(var(--header-h) - 2px); }

  .footer-grid { padding-block: 44px 28px; gap: 28px; }
}

@media (max-width: 560px) {
  .brand__name { font-size: 17px; }
  .zone-rail__link { display: none; }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .index__row { grid-template-columns: auto minmax(0, 1fr); }
  .index__meta { grid-column: 2; text-align: left; }
}

@media (min-width: 901px) {
  .header-bar__inner { min-height: 72px; }
}

/* ---------- 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;
  }

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