*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #0B0F1A;
  --color-bg-panel: #141A2E;
  --color-bg-hover: #1A2238;
  --color-accent: #00FF66;
  --color-accent-blue: #00BFFF;
  --color-text: #FFFFFF;
  --color-text-secondary: #B0B8C4;
  --color-text-muted: #6B7280;
  --color-border: #2A3447;
  --color-warning: #FFD700;
  --font-sans: 'Inter', 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --header-height: 64px;
  --content-max: 1280px;
  --gap-sm: 8px;
  --gap-md: 16px;
  --gap-lg: 24px;
  --gap-xl: 40px;
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
}

html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(42, 52, 71, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 52, 71, 0.09) 1px, transparent 1px);
  background-size: 32px 32px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

#main-content { flex: 1; display: flex; flex-direction: column; position: relative; z-index: 1; }

a { color: var(--color-text-secondary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent); }
ul, ol { list-style: none; }
img, svg, video { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; font-size: inherit; border: none; background: none; cursor: pointer; color: inherit; }

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

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

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  transition: top var(--transition-base);
}
.skip-link:focus { top: 8px; }

@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; }
  .live-dot { animation: none; opacity: 1; }
  .js-enabled [data-reveal], .js-enabled [data-reveal].is-revealed { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background:
    linear-gradient(90deg, rgba(0, 255, 102, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(0, 255, 102, 0.035) 1px, transparent 1px),
    rgba(11, 15, 26, 0.92);
  background-size: 24px 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: var(--color-accent);
  transform-origin: 0 50%;
  transform: scaleX(0);
  box-shadow: 0 0 8px rgba(0, 255, 102, 0.4);
  pointer-events: none;
  z-index: 10;
  opacity: 0.9;
}

.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gap-lg);
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
  position: relative;
}

.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  transform: skew(-3deg);
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}
.brand:hover .brand-mark { background: var(--color-accent); color: var(--color-bg); box-shadow: 0 0 16px rgba(0, 255, 102, 0.4); }

.brand-name { font-size: 18px; font-weight: 800; letter-spacing: 0.5px; color: var(--color-text); transform: skew(-2deg); white-space: nowrap; }

.site-nav { flex: 1; display: flex; align-items: center; justify-content: center; }

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

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-text); background: var(--color-bg-hover); border-color: var(--color-border); }

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(0, 255, 102, 0.08);
  border-color: rgba(0, 255, 102, 0.25);
}
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 6px rgba(0, 255, 102, 0.5);
}

.nav-num { font-family: var(--font-mono); font-size: 10px; color: var(--color-text-muted); transition: color var(--transition-fast); }
.nav-link:hover .nav-num { color: var(--color-accent); }
.nav-link[aria-current="page"] .nav-num { color: var(--color-accent); }

.header-side { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.panel-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}
.panel-link:hover { background: var(--color-accent); color: var(--color-bg); box-shadow: 0 0 16px rgba(0, 255, 102, 0.3); }

.panel-link-icon { width: 14px; height: 14px; position: relative; flex-shrink: 0; }
.panel-link-icon::before { content: ''; position: absolute; inset: 0; border: 2px solid currentColor; border-radius: 0; }
.panel-link-icon::after { content: ''; position: absolute; top: 50%; left: 50%; width: 4px; height: 4px; background: currentColor; transform: translate(-50%, -50%); }

.panel-link-text { font-size: 13px; font-weight: 600; line-height: 1; }

.live-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.live-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); animation: pulse 2s ease-in-out infinite; }
.live-text { letter-spacing: 0.02em; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.7); }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.nav-toggle:hover { border-color: var(--color-accent); background: var(--color-bg-hover); }

.nav-toggle-line { display: block; width: 18px; height: 2px; background: var(--color-text); transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-fast); }

.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); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background:
    linear-gradient(90deg, rgba(0, 191, 255, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(0, 191, 255, 0.03) 1px, transparent 1px),
    var(--color-bg-panel);
  background-size: 24px 24px;
  border-top: 1px solid var(--color-border);
  position: relative;
  margin-top: auto;
  z-index: 1;
}
.site-footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-blue) 50%, transparent 100%); }

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px var(--gap-lg) 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.6fr;
  gap: var(--gap-xl);
}

.footer-brand-block { max-width: 360px; }

.footer-brand { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .brand-mark { width: 30px; height: 30px; font-size: 16px; }
.footer-brand .brand-name { font-size: 17px; }

.footer-trust { font-size: 13px; font-weight: 600; font-family: var(--font-mono); color: var(--color-accent); letter-spacing: 0.08em; margin-bottom: 8px; text-transform: uppercase; }

.footer-desc { font-size: 13px; line-height: 1.7; color: var(--color-text-muted); }

.footer-nav-block, .footer-legal-block, .footer-contact-block { min-width: 0; }

.footer-heading {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}
.footer-heading::after { content: ''; position: absolute; bottom: -1px; left: 0; width: 24px; height: 2px; background: var(--color-accent); }

.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--color-text-secondary); transition: color var(--transition-fast), padding-left var(--transition-fast); }
.footer-links a:hover { color: var(--color-accent); padding-left: 4px; }

.footer-contact-list { display: flex; flex-direction: column; gap: 12px; }
.footer-contact-list li { font-size: 14px; color: var(--color-text-secondary); line-height: 1.5; }

.contact-label { display: block; font-family: var(--font-mono); font-size: 11px; color: var(--color-text-muted); margin-bottom: 2px; letter-spacing: 0.05em; }

.footer-bottom { border-top: 1px solid var(--color-border); padding: 16px var(--gap-lg); background: rgba(11, 15, 26, 0.4); }

.footer-bottom-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
}
.footer-icp { letter-spacing: 0.08em; }

/* ============================================================
   COMMON COMPONENTS
   ============================================================ */
.container { width: 100%; max-width: var(--content-max); margin: 0 auto; padding: 0 var(--gap-lg); }

.section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: var(--gap-lg); padding-bottom: 12px; border-bottom: 1px solid var(--color-border); position: relative; }
.section-head::after { content: ''; position: absolute; bottom: -1px; left: 0; width: 48px; height: 2px; background: var(--color-accent); }

.section-index { font-family: var(--font-mono); font-size: 14px; color: var(--color-accent); font-weight: 600; letter-spacing: 0.05em; }

.section-title { font-size: 24px; font-weight: 800; color: var(--color-text); transform: skew(-2deg); letter-spacing: 0.02em; line-height: 1.3; }

.section-sub { margin-left: auto; font-family: var(--font-mono); font-size: 12px; color: var(--color-text-muted); white-space: nowrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 22px; font-size: 14px; font-weight: 600; border: 1px solid transparent; background: transparent; cursor: pointer; text-align: center; white-space: nowrap; transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast); }

.btn-primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn-primary:hover { background: transparent; color: var(--color-accent); box-shadow: 0 0 14px rgba(0, 255, 102, 0.35); }

.btn-outline { border-color: var(--color-accent); color: var(--color-accent); }
.btn-outline:hover { background: var(--color-accent); color: var(--color-bg); box-shadow: 0 0 14px rgba(0, 255, 102, 0.3); }

.btn-blue { border-color: var(--color-accent-blue); color: var(--color-accent-blue); }
.btn-blue:hover { background: var(--color-accent-blue); color: var(--color-bg); box-shadow: 0 0 14px rgba(0, 191, 255, 0.3); }

.card { background: var(--color-bg-panel); border: 1px solid var(--color-border); padding: var(--gap-lg); transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast); border-radius: 0; }
.card:hover { border-color: rgba(0, 255, 102, 0.35); box-shadow: 0 0 24px rgba(0, 255, 102, 0.06), 0 4px 20px rgba(0, 0, 0, 0.3); }

.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: var(--gap-md); padding-bottom: var(--gap-sm); border-bottom: 1px solid var(--color-border); }
.card-title { font-size: 16px; font-weight: 700; color: var(--color-text); }
.card-body { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; }

.grid { display: grid; gap: var(--gap-lg); grid-template-columns: repeat(12, 1fr); }
.grid-2 > * { grid-column: span 6; }
.grid-3 > * { grid-column: span 4; }
.grid-4 > * { grid-column: span 3; }

.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--color-text-muted); padding: var(--gap-md) 0; }
.breadcrumb a { color: var(--color-text-muted); font-family: var(--font-mono); font-size: 12px; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb-current { color: var(--color-text-secondary); font-weight: 500; }

.frame { position: relative; border: 1px solid var(--color-border); background: var(--color-bg-panel); padding: var(--gap-lg); }
.frame::before, .frame::after { content: ''; position: absolute; width: 18px; height: 18px; border: 2px solid var(--color-accent); pointer-events: none; z-index: 1; }
.frame::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.frame::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.label { font-family: var(--font-mono); font-size: 11px; color: var(--color-text-muted); letter-spacing: 0.08em; text-transform: uppercase; }

.diagonal-line { height: 2px; max-width: 200px; background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-blue) 100%); transform: skew(-20deg); }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.js-enabled [data-reveal] { opacity: 0; transform: translateY(20px); }
.js-enabled [data-reveal].is-revealed { opacity: 1; transform: translateY(0); transition: opacity 0.6s ease, transform 0.6s ease; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .nav-link { padding: 8px 10px; font-size: 13px; }
  .live-chip { display: none; }
  .brand-name { font-size: 17px; }
  .grid-3 > *, .grid-4 > * { grid-column: span 6; }
}

@media (max-width: 768px) {
  :root { --header-height: 56px; }

  .header-inner { padding: 0 var(--gap-md); gap: var(--gap-sm); }

  .brand-mark { width: 30px; height: 30px; font-size: 16px; }
  .brand-name { font-size: 16px; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-panel);
    border-bottom: 1px solid var(--color-accent);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
    padding: var(--gap-md);
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }
  .site-nav[data-open] { display: flex; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }

  .nav-link { width: 100%; padding: 13px 16px; justify-content: flex-start; font-size: 15px; }
  .nav-link:hover { background: var(--color-bg-hover); }
  .nav-link[aria-current="page"]::after { display: none; }
  .nav-link[aria-current="page"] { border-left: 2px solid var(--color-accent); }

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

  .header-side { gap: 8px; margin-left: auto; }
  .live-chip { display: none; }
  .nav-toggle { display: flex; }
  .panel-link { padding: 6px 12px; font-size: 12px; }
  .panel-link-text { font-size: 12px; }

  .footer-inner { grid-template-columns: 1fr; gap: 28px; padding: 36px var(--gap-md) 24px; }
  .footer-brand-block { max-width: 100%; }

  .footer-bottom-inner { flex-direction: column; text-align: center; }

  .grid-2 > *, .grid-3 > *, .grid-4 > * { grid-column: span 12; }

  .section-title { font-size: 20px; }
  .section-head { flex-wrap: wrap; }
  .section-sub { display: none; }
}

@media (max-width: 480px) {
  .brand-name { font-size: 15px; letter-spacing: 0; }
  .brand-mark { width: 28px; height: 28px; font-size: 14px; }
  .panel-link { padding: 5px 10px; }
  .panel-link-text { display: none; }
  .panel-link-icon { width: 12px; height: 12px; }
  .header-inner { gap: 8px; }
}