/* /assets/site.css */
:root {
  --bg: #121416;
  --surface: #1B1F24;
  --rail: #241C18;
  --ink: #F2E9DB;
  --ink-dim: #C7BAA8;
  --accent: #FF5A36;
  --live: #4FEF82;
  --line: #3A3F45;
  --muted: #8A7C6D;
  --header-w: 260px;
  --header-h: 72px;
  --maxw: 1440px;
  --ease-out: cubic-bezier(0.2, 0, 0, 1);
  --font-display: Impact, "Arial Narrow", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  min-width: 320px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(242, 233, 219, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 233, 219, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  padding-top: var(--header-h);
}

@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--header-w);
  }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.15;
  color: var(--ink);
  margin: 0 0 0.6em;
}

p, ul, ol, dl, dd, figure {
  margin: 0 0 1em;
}

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

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 80ms var(--ease-out), background-color 80ms var(--ease-out), border-color 80ms var(--ease-out);
}

a:hover {
  color: var(--ink);
}

button {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 160ms var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.site-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 250;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(255, 90, 54, 0.55);
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  z-index: 200;
  background-color: var(--rail);
  background-image:
    linear-gradient(rgba(242, 233, 219, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 233, 219, 0.02) 1px, transparent 1px);
  background-size: 20px 20px;
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  margin: 0 auto;
  padding: 0 16px;
  max-width: 1280px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  line-height: 1.1;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  position: relative;
}

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

.brand__name {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-transform: uppercase;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.brand--footer .brand__mark {
  width: 52px;
  height: 52px;
  font-size: 22px;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: border-color 80ms var(--ease-out);
}

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

.nav-toggle__line {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  transition: transform 160ms var(--ease-out), opacity 80ms var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: min(86vw, 360px);
  z-index: 210;
  margin: 0;
  padding: 24px;
  background-color: var(--rail);
  background-image:
    linear-gradient(rgba(242, 233, 219, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 233, 219, 0.02) 1px, transparent 1px);
  background-size: 20px 20px;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform 160ms var(--ease-out), visibility 0s linear 160ms;
  display: flex;
  flex-direction: column;
}

.site-nav[data-open="true"] {
  transform: translateX(0);
  visibility: visible;
  transition: transform 160ms var(--ease-out);
}

body[data-nav-open="true"] {
  overflow: hidden;
}

.nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 8px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  position: relative;
}

.nav-link::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  opacity: 0.75;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--accent);
  background: rgba(255, 90, 54, 0.08);
}

.nav-link:hover::before,
.nav-link[aria-current="page"]::before {
  color: var(--live);
  opacity: 1;
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
}

.nav-meta {
  margin-top: auto;
  padding-top: 24px;
  display: grid;
  gap: 16px;
}

.site-search {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 8px 10px;
}

.site-search__icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 18px;
  line-height: 1;
}

.site-search__placeholder {
  flex: 1;
  min-width: 0;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-search__action {
  font-family: var(--font-mono);
  color: var(--accent);
  text-decoration: none;
  font-size: 18px;
  line-height: 1;
}

.site-search__action:hover {
  color: var(--live);
}

.nav-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.shortcut-link {
  display: inline-block;
  border: 1px solid var(--line);
  padding: 6px 10px;
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  background: transparent;
  transition: border-color 80ms var(--ease-out), color 80ms var(--ease-out);
}

.shortcut-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@media (min-width: 1024px) {
  .site-header {
    width: var(--header-w);
    height: 100vh;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .site-header__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    max-width: none;
    height: 100%;
    padding: 24px 16px 20px;
  }

  .brand {
    margin-bottom: 32px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    width: auto;
    height: auto;
    transform: none;
    visibility: visible;
    background: transparent;
    border-right: 0;
    overflow: visible;
    padding: 0;
  }

  .nav-list {
    margin-top: 8px;
  }

  .nav-link {
    padding: 12px 8px;
    font-size: 15px;
  }

  .nav-meta {
    padding-top: 24px;
  }

  .nav-shortcuts {
    flex-direction: column;
  }

  .shortcut-link {
    text-align: left;
  }
}

.page-footer {
  position: relative;
  margin-top: 80px;
  background-color: var(--surface);
  background-image:
    linear-gradient(rgba(242, 233, 219, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 233, 219, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  border-top: 1px solid var(--line);
}

.page-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 120px;
  height: 3px;
  background: var(--accent);
}

.page-footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 28px;
}

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

.footer-brand {
  display: grid;
  gap: 16px;
  align-content: start;
}

.footer-brand__statement {
  max-width: 38em;
  margin: 0;
  color: var(--ink-dim);
  font-size: 15px;
}

.footer-brand__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.footer-col {
  display: grid;
  gap: 8px;
  align-content: start;
}

.footer-col__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.footer-links {
  display: grid;
  gap: 6px;
}

.footer-links a {
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-contact p {
  margin: 0 0 4px;
  font-size: 14px;
  color: var(--ink-dim);
}

.footer-trust {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 40px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 90, 54, 0.06);
}

.footer-trust__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  background: var(--live);
  box-shadow: 0 0 10px var(--live);
  animation: live-pulse 1.8s ease-in-out infinite;
}

.footer-trust p {
  margin: 0;
  font-size: 14px;
  color: var(--ink);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.footer-legal p {
  margin: 0;
}

@keyframes live-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .footer-brand {
    grid-column: span 4;
  }

  .footer-col {
    grid-column: span 2;
  }

  .footer-contact {
    grid-column: span 4;
  }
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.section {
  padding-block: clamp(40px, 8vw, 80px);
}

.section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 24px;
}

.section-index {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 4px 8px;
  letter-spacing: 0.06em;
}

.section-title {
  margin: 0;
  font-size: clamp(22px, 4vw, 40px);
  text-transform: uppercase;
}

.section-lede {
  max-width: 42em;
  color: var(--muted);
  font-size: 15px;
}

.btn {
  display: inline-block;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--bg);
  padding: 10px 18px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 80ms var(--ease-out), color 80ms var(--ease-out);
}

.btn:hover {
  background: transparent;
  color: var(--accent);
}

.btn--ghost {
  border-color: var(--line);
  background: transparent;
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 20px;
  position: relative;
  transition: border-color 80ms var(--ease-out), transform 80ms var(--ease-out);
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.data-card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 24px;
  position: relative;
}

.data-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1;
  color: var(--accent);
}

.data-card__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.data-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (min-width: 768px) {
  .data-row {
    grid-template-columns: repeat(4, 1fr);
  }
}

.tag {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  line-height: 1.4;
}

.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--live);
  box-shadow: 0 0 10px var(--live);
  animation: live-pulse 1.8s ease-in-out infinite;
}

.media-frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(242, 233, 219, 0.04) 0 1px, transparent 1px 8px);
}

.media-frame::after {
  content: attr(data-caption);
  position: absolute;
  left: 12px;
  bottom: 10px;
  padding: 2px 6px;
  background: rgba(18, 20, 22, 0.82);
  color: var(--muted);
  font-size: 11px;
}

.prose {
  max-width: 42em;
  color: var(--ink);
}

.prose p {
  color: var(--ink-dim);
}

.prose h2 {
  font-size: 24px;
  margin-top: 2em;
}

.prose h3 {
  font-size: 18px;
}

.meta-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 14px;
}

.meta-table th,
.meta-table td {
  border: 1px solid var(--line);
  padding: 10px;
  text-align: left;
}

.meta-table th {
  background: var(--surface);
  color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .site-nav,
  .site-nav[data-open="true"] {
    transition: none;
  }

  .site-progress {
    transition: none;
  }

  .live-dot,
  .footer-trust__dot {
    animation: none;
  }
}