:root {
  --bg: #081018;
  --surface: #122030;
  --surface-hover: #1a2c42;
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --accent2: #fbbf24;
  --accent2-hover: #f59e0b;
  --text: #f0f6ff;
  --muted: #8fa0b8;
  --border: #1e3a5f;
  --font-display: 'Anton', sans-serif;
  --font-body: 'Barlow', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  counter-reset: step-counter;
}

/* Typography */
h1, h2, h3, .logo, .footer-brand { font-family: var(--font-display); font-weight: 400; letter-spacing: 0.5px; }

/* Global Components */
.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 24px; border-radius: 4px; font-weight: 600; text-decoration: none;
  transition: all 0.3s ease; text-transform: uppercase; font-family: var(--font-display);
  letter-spacing: 1px; min-height: 44px;
}
.btn-primary { background-color: var(--accent); color: var(--bg); border: 2px solid var(--accent); }
.btn-primary:hover { background-color: var(--accent-hover); border-color: var(--accent-hover); box-shadow: 0 0 15px rgba(96, 165, 250, 0.4); }
.btn-secondary { background-color: transparent; color: var(--accent); border: 2px solid var(--accent); }
.btn-secondary:hover { background-color: rgba(96, 165, 250, 0.1); }
.btn-accent { background-color: var(--accent2); color: var(--bg); border: 2px solid var(--accent2); }
.btn-accent:hover { background-color: var(--accent2-hover); border-color: var(--accent2-hover); box-shadow: 0 0 15px rgba(251, 191, 36, 0.4); }

/* Header (A1 styling) */
header { background-color: rgba(8, 16, 24, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { font-size: 2rem; color: var(--text); text-decoration: none; text-transform: uppercase; display: flex; align-items: center; gap: 8px; }
.nav-links { display: none; gap: 24px; }
.nav-links a { color: var(--text); text-decoration: none; font-weight: 500; font-size: 1rem; transition: color 0.3s; }
.nav-links a:hover { color: var(--accent); }
.header-ctas { display: none; gap: 12px; }
.mobile-toggle { background: none; border: none; color: var(--text); font-size: 1.8rem; cursor: pointer; display: block; padding: 5px; }
.mobile-menu { display: none; flex-direction: column; background-color: var(--surface); position: absolute; top: 70px; left: 0; right: 0; border-bottom: 1px solid var(--border); padding: 10px 0; }
.mobile-menu.active { display: flex; }
.mobile-menu a { padding: 15px 20px; color: var(--text); text-decoration: none; border-bottom: 1px solid var(--border); font-weight: 500; }
.mobile-menu a:last-child { border-bottom: none; }

/* Hero / Breadcrumb */
.hero-banner {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  padding: 60px 20px 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.hero-banner::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background-image: repeating-linear-gradient(45deg, rgba(30, 58, 95, 0.05) 0px, rgba(30, 58, 95, 0.05) 2px, transparent 2px, transparent 8px);
  pointer-events: none;
}
.breadcrumb { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; position: relative; z-index: 2; }
.hero-banner h1 { font-size: clamp(2.5rem, 5vw, 4rem); color: var(--text); text-transform: uppercase; margin-bottom: 1.5rem; position: relative; z-index: 2; text-shadow: 0 4px 12px rgba(0,0,0,0.5); }
.meta-chips { display: flex; justify-content: center; gap: 12px; margin-bottom: 2.5rem; position: relative; z-index: 2; flex-wrap: wrap; }
.chip { background-color: var(--bg); border: 1px solid var(--border); padding: 6px 16px; border-radius: 30px; font-size: 0.85rem; color: var(--accent2); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; box-shadow: inset 0 1px 0 rgba(255,255,255,0.05); }
.intro-quote {
  max-width: 800px; margin: 0 auto; padding: 2rem;
  background-color: rgba(18, 32, 48, 0.6);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: 1.15rem; line-height: 1.8; color: var(--text);
  text-align: left; position: relative; z-index: 2;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* Main Content */
.content-area { max-width: 840px; margin: 60px auto; padding: 0 20px; }
.guide-step {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 30px 30px 30px 80px;
  margin-bottom: 40px;
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.guide-step:hover { border-color: var(--accent); transform: translateY(-3px); }
.guide-step::before {
  counter-increment: step-counter;
  content: counter(step-counter, decimal-leading-zero);
  position: absolute;
  left: 20px; top: 30px;
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--bg);
  -webkit-text-stroke: 1px var(--accent);
  line-height: 1;
  opacity: 0.8;
}
.guide-step h2 { font-size: 1.8rem; color: var(--accent); margin-bottom: 1.2rem; text-transform: uppercase; }
.guide-step p { color: var(--muted); margin-bottom: 1.2rem; font-size: 1.05rem; }
.guide-step p:last-child { margin-bottom: 0; }
.guide-step a { color: var(--accent2); text-decoration: none; font-weight: 600; border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.guide-step a:hover { border-color: var(--accent2); }

/* Custom List */
.custom-list { list-style: none; margin: 1.5rem 0; padding: 0; background: rgba(8, 16, 24, 0.4); border-radius: 8px; padding: 1.5rem; border: 1px solid var(--border); }
.custom-list li { position: relative; padding-left: 30px; margin-bottom: 1rem; color: var(--text); font-weight: 500; }
.custom-list li:last-child { margin-bottom: 0; }
.custom-list li::before {
  content: ''; position: absolute; left: 0; top: 6px;
  width: 12px; height: 12px; background-color: var(--accent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%); /* Diamond shape */
}

/* FAQ Section */
.faq-section { margin-top: 60px; }
.faq-title { font-size: 2.2rem; text-align: center; margin-bottom: 30px; color: var(--text); text-transform: uppercase; }
details { background-color: var(--surface); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 16px; overflow: hidden; transition: all 0.3s ease; }
details:hover { border-color: var(--muted); }
summary { padding: 20px; font-weight: 600; font-size: 1.1rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; color: var(--text); list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; font-size: 1.5rem; color: var(--accent); font-family: var(--font-display); transition: transform 0.3s; }
details[open] summary::after { transform: rotate(45deg); color: var(--accent2); }
details p { padding: 0 20px 20px; color: var(--muted); border-top: 1px solid var(--border); margin-top: 10px; padding-top: 20px; }

/* Related Links */
.related-nav { max-width: 1000px; margin: 60px auto; padding: 0 20px; }
.related-nav h3 { font-size: 1.8rem; text-align: center; margin-bottom: 30px; color: var(--text); text-transform: uppercase; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.related-card {
  display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 20px; background-color: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; color: var(--muted); text-decoration: none; font-weight: 600;
  transition: all 0.3s ease; height: 100%;
}
.related-card:hover { background-color: var(--surface-hover); border-color: var(--accent); color: var(--accent); transform: translateY(-2px); box-shadow: 0 4px 15px rgba(96, 165, 250, 0.1); }

/* Bottom CTA */
.grand-cta {
  background: linear-gradient(135deg, var(--surface) 0%, #0d1a29 100%);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 80px 20px; text-align: center; margin-top: 60px; position: relative;
}
.grand-cta::before {
  content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 600px; height: 100%;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.05) 0%, transparent 70%); pointer-events: none;
}
.grand-cta h2 { font-size: 2.5rem; color: var(--text); margin-bottom: 15px; position: relative; z-index: 2; }
.grand-cta p { color: var(--muted); font-size: 1.1rem; margin-bottom: 30px; max-width: 600px; margin-left: auto; margin-right: auto; position: relative; z-index: 2; }
.cta-group { display: flex; justify-content: center; gap: 16px; position: relative; z-index: 2; flex-wrap: wrap; }

/* Footer (A2 styling) */
footer { background-color: var(--bg); border-top: 1px solid var(--border); padding: 60px 0 30px; text-align: center; }
.footer-brand { font-family: var(--font-display); font-size: 2.5rem; color: var(--text); text-transform: uppercase; margin-bottom: 15px; display: flex; justify-content: center; align-items: center; gap: 8px; }
.footer-tagline { color: var(--muted); max-width: 600px; margin: 0 auto 30px; font-size: 1rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px 25px; max-width: 900px; margin: 0 auto 30px; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 0.95rem; transition: color 0.3s; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { color: rgba(143, 160, 184, 0.5); font-size: 0.85rem; border-top: 1px solid var(--border); max-width: 1280px; margin: 0 auto; padding-top: 30px; }

/* Responsive */
@media (min-width: 768px) {
  .nav-links, .header-ctas { display: flex; }
  .mobile-toggle { display: none; }
  .guide-step { padding: 40px 40px 40px 100px; }
  .guide-step::before { left: 30px; top: 40px; font-size: 3rem; }
}
@media (max-width: 480px) {
  .intro-quote { padding: 1.5rem; font-size: 1rem; }
  .guide-step { padding: 25px 20px 25px 20px; }
  .guide-step::before { position: static; display: block; margin-bottom: 10px; font-size: 2rem; -webkit-text-stroke: 0; color: var(--border); }
  .cta-group { flex-direction: column; width: 100%; max-width: 300px; margin: 0 auto; }
  .cta-group .btn { width: 100%; }
}


/* 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; }