/* ============================================================
   开元主页 KY · 共享样式 /assets/site.css
   极简文字建筑 + 深墨蓝导航控制台
   ============================================================ */

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

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

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

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

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

main { display: block; }

[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink-950: #050D16;
  --ink-900: #08121E;
  --ink-800: #0B1B2B;
  --ink-700: #122B42;
  --ink-600: #1B3A55;

  --gold: #C8A45C;
  --gold-soft: #E8D7A9;
  --red: #C2452D;
  --jade: #2F6F62;

  --paper: #F4F1EA;
  --paper-hi: #FBF9F4;
  --mist: #9AA6B2;
  --char: #14181C;

  --line: rgba(200, 164, 92, 0.22);
  --line-soft: rgba(154, 166, 178, 0.18);

  --radius-xl: 32px;
  --radius-lg: 22px;
  --radius-md: 14px;
  --pill: 999px;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, "Times New Roman", serif;
  --font-body: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --shell: 1280px;
  --header-h: 70px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 220ms;

  color-scheme: dark;
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(120% 80% at 12% -12%, rgba(200, 164, 92, 0.10), transparent 60%),
    radial-gradient(90% 70% at 100% 0%, rgba(47, 111, 98, 0.12), transparent 55%),
    var(--ink-800);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper-hi);
}

h1 { font-size: clamp(2.125rem, 5vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 { font-size: 1.125rem; letter-spacing: 0; }

p { max-width: 76ch; }

strong { font-weight: 700; }

::selection {
  background: rgba(200, 164, 92, 0.35);
  color: var(--paper-hi);
}

:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 3px;
  border-radius: 6px;
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -90px;
  z-index: 200;
  padding: 12px 22px;
  border-radius: var(--pill);
  background: var(--gold-soft);
  color: var(--ink-950);
  font-size: 14px;
  font-weight: 700;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: 16px;
}

/* ---------- 5. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(5, 13, 22, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.site-header[data-scrolled="true"] {
  background: rgba(5, 13, 22, 0.72);
  border-bottom-color: transparent;
}

.header-console {
  max-height: 44px;
  opacity: 1;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  transition: max-height var(--dur) var(--ease), opacity 160ms linear, border-color var(--dur) linear;
}

.site-header[data-scrolled="true"] .header-console {
  max-height: 0;
  opacity: 0;
  border-color: transparent;
}

.console-inner {
  width: min(var(--shell), 100% - 48px);
  margin: 0 auto;
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.console-status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  max-width: none;
  font-size: 11px;
  letter-spacing: 0.14em;
}

.console-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 4px rgba(47, 111, 98, 0.18);
  animation: pulse 2.6s ease-in-out infinite;
}

.console-meta {
  margin: 0;
  max-width: none;
  color: rgba(154, 166, 178, 0.72);
}

.header-shell {
  width: min(var(--shell), 100% - 32px);
  margin: 0 auto;
  border: 1px solid transparent;
  border-radius: var(--pill);
  transition: margin var(--dur) var(--ease), padding var(--dur) var(--ease),
    border-color var(--dur) var(--ease), background var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--header-h);
  transition: min-height var(--dur) var(--ease);
}

.site-header[data-scrolled="true"] .header-shell {
  margin: 8px auto;
  border-color: rgba(200, 164, 92, 0.42);
  background: rgba(11, 27, 43, 0.92);
  box-shadow: 0 16px 40px rgba(2, 7, 12, 0.55);
}

.site-header[data-scrolled="true"] .header-inner {
  min-height: 56px;
}

/* brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 4px;
  border-radius: var(--radius-md);
  flex: 0 0 auto;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-950);
  background: linear-gradient(150deg, var(--gold-soft), var(--gold) 58%, #A9843F);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 8px 20px rgba(200, 164, 92, 0.18);
  transition: transform var(--dur) var(--ease);
}

.brand:hover .brand-mark {
  transform: rotate(-6deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper-hi);
}

.brand-sub {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

/* nav */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 14px;
  border-radius: var(--pill);
  font-size: 15px;
  font-weight: 500;
  color: rgba(244, 241, 234, 0.86);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gold);
  opacity: 0.62;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-label {
  letter-spacing: 0.02em;
}

.nav-link:hover {
  background: rgba(200, 164, 92, 0.12);
  color: var(--gold-soft);
}

.nav-link:hover .nav-num {
  opacity: 1;
}

.nav-link[aria-current="page"] {
  color: var(--ink-950);
  font-weight: 700;
  background: linear-gradient(150deg, var(--gold-soft), var(--gold));
  box-shadow: 0 8px 22px rgba(200, 164, 92, 0.2);
}

.nav-link[aria-current="page"] .nav-num {
  color: rgba(5, 13, 22, 0.72);
  opacity: 1;
}

/* toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 16px 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(11, 27, 43, 0.7);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: rgba(200, 164, 92, 0.55);
  background: rgba(200, 164, 92, 0.12);
}

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: var(--gold);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.nav-toggle-text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
}

/* progress */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold), var(--red));
  opacity: 0.9;
  pointer-events: none;
}

/* ---------- 6. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-950) 70%);
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 15px;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 164, 92, 0.75), transparent);
  pointer-events: none;
}

.footer-main {
  width: min(var(--shell), 100% - 48px);
  margin: 0 auto;
  padding: 64px 0 48px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 44px 40px;
}

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

.footer-col--brand { max-width: 330px; }

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--gold-soft);
  border: 1px solid rgba(200, 164, 92, 0.5);
  background: rgba(200, 164, 92, 0.1);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper-hi);
}

.footer-note {
  margin: 0 0 14px;
  max-width: 34ch;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

.footer-icp {
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(200, 164, 92, 0.85);
}

.footer-col-title {
  margin: 0 0 16px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-links {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.footer-link {
  display: inline-block;
  padding: 2px 0;
  color: rgba(244, 241, 234, 0.78);
  font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-link:hover {
  color: var(--gold-soft);
  border-bottom-color: rgba(200, 164, 92, 0.6);
}

.footer-contact {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
}

.contact-item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 8px 12px;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  padding-top: 3px;
}

.contact-value {
  font-size: 14px;
  color: rgba(244, 241, 234, 0.86);
  word-break: break-word;
}

.copy-btn {
  grid-column: 2;
  justify-self: start;
  margin-top: 2px;
  padding: 6px 14px;
  border: 1px dashed rgba(200, 164, 92, 0.45);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.copy-btn:hover {
  background: rgba(200, 164, 92, 0.14);
  border-style: solid;
  color: var(--gold-soft);
}

.copy-btn[data-copied="true"] {
  background: rgba(47, 111, 98, 0.25);
  border-color: rgba(47, 111, 98, 0.75);
  color: #9FD6C8;
}

.copy-btn[data-copied="false"] {
  background: rgba(194, 69, 45, 0.18);
  border-color: rgba(194, 69, 45, 0.7);
  color: #E8A091;
}

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

.footer-bottom-inner {
  width: min(var(--shell), 100% - 48px);
  margin: 0 auto;
  padding: 20px 0 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(154, 166, 178, 0.8);
}

.footer-copy,
.footer-legal {
  margin: 0;
  max-width: none;
}

.footer-legal {
  color: rgba(200, 164, 92, 0.75);
}

/* ---------- 7. Layout helpers ---------- */
.container {
  width: min(var(--shell), 100% - 48px);
  margin-inline: auto;
}

.section {
  padding: clamp(56px, 8vw, 104px) 0;
}

.section--tight {
  padding: clamp(36px, 5vw, 64px) 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: clamp(28px, 4vw, 44px);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

.section-head h2 {
  margin: 0;
  max-width: 24ch;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  align-items: start;
  gap: clamp(24px, 4vw, 56px);
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

/* ---------- 8. Typography helpers ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
  opacity: 0.7;
}

.lede {
  margin: 0;
  max-width: 52ch;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.78);
}

.prose { max-width: 72ch; }

.prose p { margin: 0 0 1.2em; }

.prose h2 {
  margin: 2.2em 0 0.6em;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
}

.prose h3 { margin: 1.8em 0 0.5em; }

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.2em;
}

.prose li { margin-bottom: 0.5em; }

.prose strong { color: var(--paper-hi); }

.prose a {
  color: var(--gold-soft);
  border-bottom: 1px solid rgba(200, 164, 92, 0.5);
}

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

/* ---------- 9. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--red);
  color: var(--paper-hi);
  box-shadow: 0 12px 28px rgba(194, 69, 45, 0.28);
}

.btn--primary:hover { background: #D14E34; }

.btn--ghost {
  border-color: rgba(200, 164, 92, 0.55);
  background: rgba(200, 164, 92, 0.06);
  color: var(--gold-soft);
}

.btn--ghost:hover {
  border-color: var(--gold);
  background: rgba(200, 164, 92, 0.16);
}

.btn--quiet {
  border-color: var(--line-soft);
  background: rgba(244, 241, 234, 0.06);
  color: var(--paper);
}

.btn--quiet:hover { background: rgba(244, 241, 234, 0.12); }

/* ---------- 10. Tags & chips ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid rgba(200, 164, 92, 0.4);
  border-radius: var(--pill);
  background: rgba(200, 164, 92, 0.1);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-soft);
}

.tag--red {
  border-color: rgba(194, 69, 45, 0.5);
  background: rgba(194, 69, 45, 0.14);
  color: #EBA795;
}

.tag--jade {
  border-color: rgba(47, 111, 98, 0.6);
  background: rgba(47, 111, 98, 0.18);
  color: #8FD0C1;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--pill);
  background: rgba(244, 241, 234, 0.04);
  font-size: 13px;
  color: rgba(244, 241, 234, 0.8);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.chip:hover {
  border-color: rgba(200, 164, 92, 0.45);
  background: rgba(200, 164, 92, 0.1);
  color: var(--gold-soft);
}

/* ---------- 11. Cards & panels ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(18, 43, 66, 0.85), rgba(11, 27, 43, 0.92));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(200, 164, 92, 0.42);
  box-shadow: 0 24px 50px rgba(2, 7, 12, 0.45);
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper-hi);
}

.card-meta {
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.card-body {
  margin: 0;
  max-width: none;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.74);
}

.panel {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(150deg, rgba(5, 13, 22, 0.92), rgba(11, 27, 43, 0.86));
  overflow: hidden;
}

.panel::after {
  content: "";
  position: absolute;
  right: -30%;
  bottom: -60%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 164, 92, 0.16), transparent 70%);
  pointer-events: none;
}

/* ---------- 12. Stat strip ---------- */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--line-soft);
  overflow: hidden;
}

.stat {
  display: grid;
  gap: 6px;
  padding: 22px;
  background: rgba(11, 27, 43, 0.9);
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold-soft);
}

.stat-label {
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 13. Index list ---------- */
.index-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.index-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 18px 6px;
  border-bottom: 1px solid var(--line-soft);
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.index-item:hover {
  background: rgba(200, 164, 92, 0.06);
  padding-left: 14px;
}

.index-main {
  margin: 0;
  max-width: none;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper-hi);
}

.index-meta {
  margin: 0;
  max-width: none;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---------- 14. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(200, 164, 92, 0.6);
}

.breadcrumb a { color: rgba(244, 241, 234, 0.75); }

.breadcrumb a:hover { color: var(--gold-soft); }

/* ---------- 15. Filter bar ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
}

.filter-btn {
  padding: 9px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--pill);
  background: rgba(244, 241, 234, 0.04);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(244, 241, 234, 0.8);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.filter-btn:hover {
  border-color: rgba(200, 164, 92, 0.5);
  color: var(--gold-soft);
}

.filter-btn[aria-pressed="true"] {
  border-color: transparent;
  background: linear-gradient(150deg, var(--gold-soft), var(--gold));
  color: var(--ink-950);
  font-weight: 700;
}

.filter-count {
  margin: 0 0 0 auto;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.filter-empty {
  margin: 0;
  max-width: none;
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 16. Media frames ---------- */
.media-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, #0E2338, #050D16);
  overflow: hidden;
}

.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame > img,
.media-frame > picture > img,
.media-frame > .media-fill {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(5, 13, 22, 0.6));
  pointer-events: none;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

/* ---------- 17. Motion ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 280ms var(--ease), transform 280ms var(--ease);
}

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

.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 70;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(200, 164, 92, 0.5);
  border-radius: 50%;
  background: rgba(5, 13, 22, 0.86);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 15px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) linear,
    transform var(--dur) var(--ease);
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.to-top:hover { transform: translateY(-3px); }

/* ---------- 18. Responsive ---------- */
@media (max-width: 1040px) {
  .brand-sub { display: none; }
  .nav-link { padding: 9px 11px; font-size: 14px; }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 40px 32px;
  }

  .footer-col--brand { max-width: none; }
}

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

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 12px;
    right: 12px;
    display: block;
    max-height: calc(100vh - 140px);
    padding: 14px;
    border: 1px solid rgba(200, 164, 92, 0.32);
    border-radius: 26px;
    background: linear-gradient(180deg, rgba(11, 27, 43, 0.99), rgba(5, 13, 22, 0.99));
    box-shadow: 0 28px 60px rgba(2, 7, 12, 0.6);
    overflow: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
      visibility var(--dur) linear;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(8px);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .nav-link {
    justify-content: space-between;
    padding: 14px 18px;
    border-radius: 18px;
    background: rgba(244, 241, 234, 0.04);
    font-size: 16px;
  }

  .nav-num { font-size: 11px; }

  .split { grid-template-columns: 1fr; }

  .filter-count { margin-left: 0; width: 100%; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .container,
  .console-inner,
  .footer-main,
  .footer-bottom-inner { width: min(var(--shell), 100% - 32px); }

  .site-footer { margin-top: 64px; }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 0 36px;
  }

  .footer-bottom-inner { padding: 18px 0 24px; }

  .index-item { grid-template-columns: auto 1fr; }
  .index-meta { grid-column: 2; text-align: left; }

  .to-top { right: 14px; bottom: 14px; }
}

/* ---------- 19. 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;
  }

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