:root {
  --bg: #070d12;
  --surface: #122030;
  --accent: #f97316;
  --accent2: #38bdf8;
  --text: #f0f8ff;
  --muted: #8fa5b8;
  --border: rgba(143, 165, 184, 0.2);
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Fira Sans', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  background-position: center top;
}
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
a { color: var(--accent2); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }
h1, h2, h3, .brand, .footer-brand { font-family: var(--font-display); text-transform: uppercase; font-weight: 500; }

/* Header Styles (Matching Part A constraints) */
header { background-color: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.brand { font-size: 1.5rem; font-weight: 700; color: var(--text); letter-spacing: 1px; display: flex; align-items: center; gap: 0.5rem; }
.nav-links { display: none; gap: 1.5rem; }
.nav-links a { color: var(--text); font-family: var(--font-display); font-size: 0.95rem; letter-spacing: 0.5px; }
.nav-links a:hover { color: var(--accent2); }
.nav-actions { display: none; gap: 1rem; align-items: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.5rem 1.25rem; font-family: var(--font-display); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; border-radius: 2px; cursor: pointer; transition: all 0.2s; min-height: 44px; border: 1px solid transparent; }
.btn-primary { background-color: var(--accent); color: #fff; }
.btn-primary:hover { background-color: #e0630b; color: #fff; }
.btn-secondary { background-color: transparent; border-color: var(--accent2); color: var(--accent2); }
.btn-secondary:hover { background-color: rgba(56, 189, 248, 0.1); }
.menu-toggle { background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; min-height: 44px; min-width: 44px; display: flex; align-items: center; justify-content: center; }
.mobile-menu { display: none; background-color: var(--surface); border-bottom: 1px solid var(--border); padding: 1rem; flex-direction: column; gap: 1rem; }
.mobile-menu.active { display: flex; }
.mobile-menu a { color: var(--text); font-family: var(--font-display); font-size: 1.1rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu .btn { border-bottom: none; padding-bottom: 0.5rem; text-align: center; }

/* Page Specific Styles - Terminal Station Motif */
.page-header {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(18, 32, 48, 0.8) 0%, rgba(7, 13, 18, 0.9) 100%);
  position: relative;
}
.page-header::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--accent2);
}
.breadcrumb {
  font-family: monospace; font-size: 0.85rem; color: var(--muted); margin-bottom: 1.5rem;
  display: inline-block; padding: 0.25rem 0.75rem; background: rgba(143, 165, 184, 0.1); border: 1px solid var(--border);
}
.page-title {
  font-size: 2.2rem; line-height: 1.2; margin-bottom: 1rem; color: #fff; text-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}
.meta-chips { display: flex; gap: 1rem; flex-wrap: wrap; }
.chip {
  font-family: monospace; font-size: 0.75rem; color: var(--accent2); border: 1px solid var(--accent2);
  padding: 0.25rem 0.5rem; text-transform: uppercase; letter-spacing: 1px; background: rgba(56, 189, 248, 0.05);
}
.chip::before { content: '>'; margin-right: 0.5rem; color: var(--accent); }

.content-area { padding: 3rem 0; }
.intro-block {
  background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  padding: 1.5rem; margin-bottom: 2.5rem; position: relative;
}
.intro-block::after {
  content: '_'; animation: blink 1s step-end infinite; color: var(--accent); font-weight: bold;
}
@keyframes blink { 50% { opacity: 0; } }
.intro-block p { font-size: 1.05rem; color: #e2e8f0; }

.grid-layout { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 3rem; }
.panel {
  background: var(--surface); border: 1px solid var(--border); padding: 1.5rem;
  position: relative; transition: border-color 0.3s;
}
.panel:hover { border-color: rgba(56, 189, 248, 0.4); }
.panel-header {
  border-bottom: 1px solid var(--border); padding-bottom: 0.75rem; margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.panel-header h2 { font-size: 1.3rem; color: var(--accent2); margin: 0; }
.panel-header::before {
  content: '■'; color: var(--accent); font-size: 0.8rem;
}
.panel p { margin-bottom: 1rem; color: var(--text); }
.panel p:last-child { margin-bottom: 0; }
.panel a { border-bottom: 1px dashed var(--accent2); }
.panel a:hover { border-bottom-style: solid; color: var(--accent); border-color: var(--accent); }

.terminal-list { list-style: none; margin: 1rem 0; padding: 0; }
.terminal-list li {
  position: relative; padding-left: 1.5rem; margin-bottom: 0.75rem; color: #e2e8f0;
}
.terminal-list li::before {
  content: '›'; position: absolute; left: 0; top: -2px; color: var(--accent); font-family: monospace; font-size: 1.2rem; font-weight: bold;
}

.faq-section { margin-bottom: 3rem; }
.section-title { font-size: 1.8rem; margin-bottom: 1.5rem; color: #fff; border-bottom: 2px solid var(--border); padding-bottom: 0.5rem; display: inline-block; }
details {
  background: var(--surface); border: 1px solid var(--border); margin-bottom: 0.5rem; transition: background 0.2s;
}
details[open] { border-color: var(--accent2); background: rgba(18, 32, 48, 0.8); }
summary {
  padding: 1.25rem; font-family: var(--font-display); font-size: 1.1rem; text-transform: uppercase; letter-spacing: 0.5px;
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; color: var(--text);
}
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--accent2); font-family: monospace; font-size: 1.5rem; font-weight: bold; line-height: 1; }
details[open] summary::after { content: '-'; color: var(--accent); }
details p { padding: 0 1.25rem 1.25rem; border-top: 1px dashed var(--border); margin-top: 0.5rem; padding-top: 1.25rem; color: var(--muted); }

.related-nav { margin-bottom: 3rem; background: var(--surface); border: 1px solid var(--border); padding: 1.5rem; }
.related-nav h3 { font-size: 1.2rem; color: var(--muted); margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; }
.related-nav h3::before { content: '>>'; color: var(--accent2); font-family: monospace; }
.link-grid { display: grid; grid-template-columns: 1fr; gap: 0.75rem; }
.nav-pill {
  display: block; padding: 1rem; border: 1px solid var(--border); background: rgba(7, 13, 18, 0.5);
  font-family: var(--font-display); text-transform: uppercase; text-align: center; letter-spacing: 1px;
  color: var(--text); transition: all 0.2s;
}
.nav-pill:hover { background: var(--accent2); color: var(--bg); border-color: var(--accent2); }

.cta-terminal {
  background: linear-gradient(135deg, var(--surface) 0%, #172a3f 100%);
  border: 1px solid var(--accent); border-left: 6px solid var(--accent);
  padding: 3rem 1.5rem; text-align: center;
}
.cta-terminal h2 { font-size: 2rem; color: #fff; margin-bottom: 1rem; }
.cta-terminal p { color: var(--muted); margin-bottom: 2rem; font-size: 1.1rem; }
.cta-actions { display: flex; flex-direction: column; gap: 1rem; justify-content: center; align-items: center; }
.cta-actions .btn { width: 100%; max-width: 300px; padding: 1rem; font-size: 1.1rem; }

/* Footer Styles */
footer { background-color: var(--surface); border-top: 1px solid var(--border); padding: 3rem 0; margin-top: 2rem; }
.footer-brand { font-size: 2rem; font-weight: 700; color: var(--text); margin-bottom: 1rem; letter-spacing: 2px; }
.footer-tagline { color: var(--muted); margin-bottom: 2rem; max-width: 600px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem 2rem; margin-bottom: 2rem; }
.footer-links a { color: var(--text); font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent); }
.copyright { color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--border); padding-top: 1.5rem; }

/* Responsive Breakpoints */
@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-actions { display: flex; }
  .menu-toggle { display: none; }
  .mobile-menu { display: none !important; }
  .page-title { font-size: 2.8rem; }
  .grid-layout { grid-template-columns: repeat(2, 1fr); }
  .panel:nth-child(3), .panel:nth-child(4) { grid-column: span 1; }
  .link-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-actions { flex-direction: row; }
  .cta-actions .btn { width: auto; min-width: 200px; }
}
@media (min-width: 1024px) {
  .page-title { font-size: 3.2rem; }
  .link-grid { grid-template-columns: repeat(4, 1fr); }
}


/* pipeline image & layout guards */
html, body { overflow-x: clip; }
img { max-width: 100%; height: auto; }
img.site-logo { height: 40px; width: auto; max-width: 240px; object-fit: contain; flex: none; }
header .logo a { display: inline-flex; align-items: center; flex: none; text-decoration: none; }
img.hero-visual { width: 100%; max-width: 560px; height: auto; object-fit: cover; border-radius: 16px; display: block; margin-inline: auto; }
img[class^="strip-"], img[class*=" strip-"] { width: 100%; height: auto; display: block; border-radius: 12px; object-fit: cover; }
/* 合规声明块（zb-disclaimer，全站 footer） */
.zb-disclaimer { margin-top: 18px !important; padding: 14px 0 0 0 !important; border-top: 1px solid rgba(128,128,128,.25) !important; font-size: .72rem !important; line-height: 1.7 !important; opacity: .85 !important; display: block !important; text-align: left !important; width: 100% !important; clear: both !important; }
.zb-disclaimer .zb-18 { display: inline-block !important; padding: 2px 10px !important; border: 1.5px solid currentColor !important; border-radius: 6px !important; font-weight: 800 !important; letter-spacing: 1px !important; margin: 0 0 10px 0 !important; font-size: .78rem !important; }
.zb-disclaimer p { display: block !important; margin: 5px 0 !important; padding: 0 !important; color: inherit !important; font-size: .72rem !important; line-height: 1.7 !important; }
.zb-disclaimer p:last-child { margin-bottom: 0 !important; }