:root {
  --ink-900: #050B14;
  --ink-800: #0A1526;
  --ink-700: #10203A;
  --line-600: #1E3350;
  --cyan-500: #34F5D0;
  --cyan-200: #9BF3E4;
  --coral-500: #FF7A59;
  --silver-400: #C3CCDA;
  --snow-050: #EAF2FB;
  --indigo-500: #5A8CFF;

  --bg: var(--ink-800);
  --panel: var(--ink-700);
  --stroke: var(--line-600);
  --text: var(--snow-050);
  --muted: var(--silver-400);

  --font-head: "Archivo Narrow", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 28px;
  --r-pill: 999px;
  --bevel: 10deg;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 72px;

  --wrap: 1280px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 320ms;
  --shadow-lift: 0 18px 40px -24px rgba(0, 0, 0, .85);
}

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

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

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(52, 245, 208, .07), transparent 62%),
    radial-gradient(900px 520px at 92% 4%, rgba(90, 140, 255, .09), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.78;
  letter-spacing: .01em;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(30, 51, 80, .34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 51, 80, .34) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: radial-gradient(120% 100% at 50% 0%, #000 25%, transparent 88%);
  opacity: .5;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--text);
  letter-spacing: -.01em;
  line-height: 1.08;
  text-transform: uppercase;
  margin: 0 0 var(--sp-4);
  font-weight: 800;
}

h1 { font-size: clamp(30px, 5vw, 64px); font-weight: 900; }
h2 { font-size: clamp(24px, 3.6vw, 44px); }
h3 { font-size: clamp(19px, 2.4vw, 28px); }
h4 { font-size: 17px; letter-spacing: .04em; }

p { margin: 0 0 1.2em; }
a { color: var(--cyan-500); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--cyan-200); }

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

::selection { background: rgba(52, 245, 208, .28); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: -80px;
  z-index: 90;
  background: var(--cyan-500);
  color: var(--ink-900);
  font-weight: 700;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--sp-4); color: var(--ink-900); }

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, var(--ink-900) 0%, rgba(5, 11, 20, .93) 100%);
  border-bottom: 1px solid var(--stroke);
  backdrop-filter: blur(10px);
}

.header-inner {
  width: min(100% - 40px, var(--wrap));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  min-height: 84px;
  padding: var(--sp-3) 0;
}

.brand-block {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  flex: 0 0 auto;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}
.brand-mark:hover { color: var(--text); }

.brand-glyph {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  height: 22px;
}
.brand-glyph i {
  display: block;
  width: 5px;
  border-radius: 3px;
  background: var(--cyan-500);
}
.brand-glyph i:nth-child(1) { height: 12px; background: var(--silver-400); }
.brand-glyph i:nth-child(2) { height: 22px; }
.brand-glyph i:nth-child(3) { height: 16px; background: var(--indigo-500); }

.brand-name {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan-200);
  border: 1px solid rgba(52, 245, 208, .38);
  background: rgba(52, 245, 208, .07);
  padding: 4px 12px;
  border-radius: var(--r-pill);
  white-space: nowrap;
}

.cert-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 0 0 rgba(52, 245, 208, .55);
  animation: pulse 2.6s var(--ease) infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 245, 208, .5); }
  70% { box-shadow: 0 0 0 9px rgba(52, 245, 208, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 245, 208, 0); }
}

.brand-tag {
  flex: 1 0 100%;
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
}

.header-search { flex: 1 1 auto; display: flex; justify-content: center; }

.search-pill {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  width: min(360px, 100%);
  background: var(--ink-700);
  border: 1px solid var(--stroke);
  border-radius: var(--r-pill);
  padding: 8px 14px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.search-pill:focus-within {
  border-color: var(--cyan-500);
  box-shadow: 0 0 0 3px rgba(52, 245, 208, .16);
}

.search-icon {
  width: 14px; height: 14px;
  border: 2px solid var(--silver-400);
  border-radius: 50%;
  position: relative;
  flex: 0 0 auto;
}
.search-icon::after {
  content: "";
  position: absolute;
  right: -5px; bottom: -4px;
  width: 7px; height: 2px;
  background: var(--silver-400);
  transform: rotate(45deg);
  border-radius: 2px;
}

.search-input {
  flex: 1 1 auto;
  min-width: 0;
  background: transparent;
  border: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 4px 0;
}
.search-input::placeholder { color: rgba(195, 204, 218, .6); }
.search-input:focus { outline: none; }

.search-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--silver-400);
  border: 1px solid var(--stroke);
  border-radius: 6px;
  padding: 1px 6px;
  flex: 0 0 auto;
}

.header-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  color: var(--silver-400);
  font-size: 14px;
  letter-spacing: .06em;
  padding: 8px 12px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-link:hover {
  color: var(--text);
  background: rgba(52, 245, 208, .08);
  border-color: rgba(52, 245, 208, .28);
}
.nav-link[aria-current="page"] {
  color: var(--ink-900);
  background: var(--cyan-500);
  border-color: var(--cyan-500);
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex: 0 0 auto;
}

.action-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--cyan-500);
  color: var(--ink-900);
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--cyan-500);
  white-space: nowrap;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.action-pill:hover {
  color: var(--ink-900);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -12px rgba(52, 245, 208, .8);
}

.action-pill--ghost {
  background: transparent;
  color: var(--cyan-200);
  border-color: rgba(52, 245, 208, .45);
}
.action-pill--ghost:hover {
  color: var(--ink-900);
  background: var(--cyan-200);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--ink-700);
  cursor: pointer;
  padding: 0;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  display: block;
  position: absolute;
  left: 50%;
  width: 18px; height: 2px;
  background: var(--cyan-500);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  transform: translateX(-50%);
}
.nav-toggle-bar { top: 50%; margin-top: -1px; }
.nav-toggle-bar::before { content: ""; top: -6px; }
.nav-toggle-bar::after { content: ""; top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateX(-50%) rotate(45deg); top: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateX(-50%) rotate(-45deg); top: 0; }

.header-rule {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan-500) 12%, var(--indigo-500) 55%, transparent);
  opacity: .55;
}

.progress-bar {
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan-500), var(--coral-500));
  transition: width 120ms linear;
}

/* ============ LAYOUT PRIMITIVES ============ */
.page-shell {
  position: relative;
  z-index: 1;
  width: min(100% - 40px, var(--wrap));
  margin-inline: auto;
  padding: var(--sp-7) 0 var(--sp-8);
}

.section { margin-bottom: var(--sp-8); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-5);
  flex-wrap: wrap;
  border-bottom: 1px solid var(--stroke);
  padding-bottom: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.eyebrow {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan-200);
  margin: 0 0 var(--sp-2);
  font-family: var(--font-head);
}

.section-title { margin: 0; }
.section-lede { color: var(--muted); font-size: 15px; margin: 0; max-width: 62ch; }

.grid { display: grid; gap: var(--sp-5); grid-template-columns: repeat(12, 1fr); }
.grid--7-5 > *:nth-child(1) { grid-column: span 7; }
.grid--7-5 > *:nth-child(2) { grid-column: span 5; }
.grid--4-8 > *:nth-child(1) { grid-column: span 4; }
.grid--4-8 > *:nth-child(2) { grid-column: span 8; }
.grid--3 > * { grid-column: span 4; }

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  list-style: none;
  margin: 0 0 var(--sp-6);
  padding: 0;
  font-size: 13px;
  color: var(--muted);
}
.crumb { display: inline-flex; align-items: center; gap: var(--sp-2); }
.crumb:not(:last-child)::after { content: "/"; color: var(--stroke); }
.crumb a { color: var(--silver-400); }
.crumb a:hover { color: var(--cyan-500); }

.panel {
  background: var(--panel);
  border: 1px solid var(--stroke);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
}
.panel--bevel {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  border-bottom-right-radius: 0;
}

.card {
  background: var(--ink-700);
  border: 1px solid var(--stroke);
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-5);
  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(52, 245, 208, .45);
  box-shadow: var(--shadow-lift);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan-200);
  border: 1px solid var(--stroke);
  background: rgba(16, 32, 58, .8);
  border-radius: var(--r-pill);
  padding: 5px 12px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.chip:hover,
.chip[aria-pressed="true"] {
  color: var(--ink-900);
  background: var(--cyan-500);
  border-color: var(--cyan-500);
}
.chip--alert { color: var(--coral-500); border-color: rgba(255, 122, 89, .5); }
.chip--alert:hover, .chip--alert[aria-pressed="true"] { background: var(--coral-500); color: var(--ink-900); border-color: var(--coral-500); }

.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(48px, 8vw, 128px);
  line-height: .9;
  color: var(--cyan-500);
  font-weight: 700;
  letter-spacing: -.03em;
  display: block;
}
.stat-label {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--font-head);
}

.note-line {
  border-left: 2px solid var(--cyan-500);
  padding-left: var(--sp-4);
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 1.2em;
}

.timeline { position: relative; overflow-x: auto; padding-bottom: var(--sp-3); }
.timeline-track {
  display: flex;
  gap: var(--sp-5);
  align-items: flex-start;
  min-width: max-content;
  padding-top: var(--sp-4);
}
.timeline-item {
  position: relative;
  min-width: 180px;
  padding-top: var(--sp-4);
}
.timeline-item::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--stroke);
}
.timeline-item::after {
  content: "";
  position: absolute;
  top: -4px; left: 0;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--cyan-500);
}
.timeline-tick {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--silver-400);
}

/* ============ MEDIA FRAMES ============ */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: linear-gradient(160deg, var(--ink-700), var(--ink-900));
  aspect-ratio: 16 / 9;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame > img,
.media-frame > .media-placeholder {
  width: 100%; height: 100%;
  object-fit: cover;
}
.media-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(52, 245, 208, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(52, 245, 208, .10) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

/* ============ REVEAL + MOTION ============ */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 420ms var(--ease), transform 420ms var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }

/* ============ FOOTER ============ */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: var(--sp-8);
  background: var(--ink-900);
  border-top: 1px solid var(--stroke);
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  width: min(100% - 40px, var(--wrap));
  margin-inline: auto;
  padding: var(--sp-6) 0 var(--sp-5);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.6fr;
  gap: var(--sp-5);
  padding-bottom: var(--sp-5);
  border-bottom: 1px solid var(--stroke);
}

.footer-brand {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: var(--sp-3);
}
.footer-brand:hover { color: var(--cyan-500); }

.footer-cert {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan-200);
  margin: 0 0 var(--sp-3);
}

.footer-legal, .footer-copy { margin: 0 0 6px; font-size: 13px; color: var(--silver-400); }

.footer-title {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan-200);
  margin: 0 0 var(--sp-3);
  font-weight: 700;
}

.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-links a { color: var(--silver-400); font-size: 14px; }
.footer-links a:hover { color: var(--cyan-500); }

.contact-line { margin: 0 0 8px; line-height: 1.6; }
.contact-line a { color: var(--cyan-200); word-break: break-all; }
.footer-note {
  margin: var(--sp-3) 0 0;
  font-size: 13px;
  border-left: 2px solid var(--coral-500);
  padding-left: var(--sp-3);
  color: var(--muted);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  padding-top: var(--sp-4);
}
.footer-meta { margin: 0; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--silver-400); }

.to-top {
  border: 1px solid var(--stroke);
  border-radius: var(--r-pill);
  padding: 7px 16px;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan-200);
  background: var(--ink-700);
}
.to-top:hover { background: var(--cyan-500); color: var(--ink-900); border-color: var(--cyan-500); }

/* ============ RESPONSIVE ============ */
@media (max-width: 1180px) {
  .header-search { display: none; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--contact { grid-column: span 3; }
}

@media (max-width: 960px) {
  .grid { gap: var(--sp-4); }
  .grid--7-5 > *, .grid--4-8 > * { grid-column: span 12; }
  .grid--3 > * { grid-column: span 6; }
  .header-inner { flex-wrap: wrap; gap: var(--sp-3); }
  .brand-block { flex: 1 1 60%; }
  .brand-tag { display: none; }
  .header-nav {
    order: 4;
    flex: 1 0 100%;
    margin-left: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 360ms var(--ease), opacity 240ms var(--ease);
    opacity: 0;
  }
  .header-nav[data-open] { max-height: 420px; opacity: 1; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; padding-top: var(--sp-2); }
  .nav-link {
    border-radius: var(--r-md);
    background: var(--ink-700);
    border-color: var(--stroke);
    padding: 12px 16px;
    font-size: 15px;
  }
  .nav-toggle { display: block; }
  .header-actions { margin-left: auto; }
  .action-pill { padding: 9px 14px; font-size: 13px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .page-shell { width: min(100% - 28px, var(--wrap)); padding: var(--sp-6) 0 var(--sp-7); }
  .header-inner, .footer-inner { width: min(100% - 28px, var(--wrap)); }
  .brand-tag { display: none; }
  .action-pill--ghost { display: none; }
  .section { margin-bottom: var(--sp-7); }
  .panel { padding: var(--sp-4); border-radius: var(--r-md); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
  .footer-col--contact { grid-column: span 2; }
  .timeline-track { gap: var(--sp-4); }
}

@media (max-width: 480px) {
  .brand-name { font-size: 18px; }
  .cert-badge { font-size: 11px; padding: 3px 10px; }
  .grid--3 > * { grid-column: span 12; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-col--contact { grid-column: span 1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}