:root {
  --bg: #070d12;
  --surface: #122030;
  --surface-hover: #1a2d42;
  --accent: #f97316;
  --accent-hover: #ea580c;
  --accent2: #38bdf8;
  --text: #f0f8ff;
  --muted: #8fa5b8;
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Fira Sans', 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;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
}

.btn-primary {
  background-color: var(--accent);
  color: #fff;
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--text);
  border-color: var(--muted);
}

.btn-secondary:hover {
  border-color: var(--text);
  color: var(--text);
}

/* Header */
header {
  background-color: var(--bg);
  border-bottom: 1px solid var(--surface);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-links {
  display: none;
}

.nav-actions {
  display: none;
}

.menu-toggle {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background-color: var(--surface);
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  padding: 1rem;
  border-bottom: 1px solid var(--accent);
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  padding: 0.75rem 0;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--surface-hover);
  font-size: 1rem;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu .btn {
  margin-top: 0.5rem;
  border-bottom: none;
}

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
  .nav-links {
    display: flex;
    gap: 1.5rem;
  }
  .nav-links a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
  }
  .nav-links a:hover {
    color: var(--accent2);
  }
  .nav-actions {
    display: flex;
    gap: 1rem;
  }
  .mobile-menu { display: none !important; }
}

/* Page Layout */
.page-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Hero Section */
.hero {
  background-color: var(--surface);
  background-image: linear-gradient(180deg, rgba(7,13,18,0) 0%, var(--bg) 100%),
                    radial-gradient(var(--surface-hover) 1px, transparent 1px);
  background-size: 100% 100%, 20px 20px;
  padding: 3rem 1rem 4rem;
  border-bottom: 1px solid var(--surface-hover);
  margin-bottom: 3rem;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-size: 2.25rem;
  color: var(--text);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.chip {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid var(--accent2);
  color: var(--accent2);
  font-size: 0.75rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Content Area */
.intro-block {
  background: var(--surface);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  margin-bottom: 3rem;
  font-size: 1.125rem;
  color: var(--text);
  line-height: 1.8;
}

.content-section {
  margin-bottom: 3rem;
}

.content-section h2 {
  font-size: 1.5rem;
  color: var(--accent2);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--surface);
  text-transform: uppercase;
}

.content-section p {
  color: var(--muted);
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

.content-section p:last-child {
  margin-bottom: 0;
}

.content-section a {
  color: var(--accent2);
  text-decoration: none;
  border-bottom: 1px dashed var(--accent2);
  transition: all 0.2s;
}

.content-section a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.data-list {
  list-style: none;
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: #0a131a;
  border: 1px solid var(--surface-hover);
}

.data-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  color: var(--muted);
}

.data-list li:last-child {
  margin-bottom: 0;
}

.data-list li::before {
  content: '>';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: bold;
  font-size: 1.2rem;
  line-height: 1;
}

/* FAQ Section */
.faq-section {
  margin-bottom: 4rem;
}

.faq-section h2 {
  font-size: 1.75rem;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text);
}

.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

details {
  background: var(--surface);
  border: 1px solid var(--surface-hover);
}

details[open] {
  border-color: var(--accent2);
}

summary {
  padding: 1.25rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 400;
}

details[open] summary::after {
  content: '-';
}

details p {
  padding: 0 1.25rem 1.25rem;
  margin: 0;
  color: var(--muted);
  border-top: 1px solid var(--surface-hover);
  padding-top: 1.25rem;
}

/* Related Links */
.related-block {
  background: var(--bg);
  border: 1px dashed var(--surface-hover);
  padding: 2rem;
  margin: 4rem 0;
  text-align: center;
}

.related-block h3 {
  font-size: 1.25rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.related-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.related-nav a {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  color: var(--accent2);
  text-decoration: none;
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 1px;
  border: 1px solid var(--surface-hover);
  transition: all 0.2s;
}

.related-nav a:hover {
  background: var(--accent2);
  color: var(--bg);
  border-color: var(--accent2);
}

/* CTA Block */
.grand-cta {
  background: linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);
  border: 1px solid var(--accent);
  padding: 3rem 1.5rem;
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
  overflow: hidden;
}

.grand-cta::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: var(--accent);
}

.grand-cta h2 {
  font-size: 2rem;
  color: var(--text);
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.grand-cta p {
  color: var(--muted);
  margin-bottom: 2rem;
  font-size: 1.125rem;
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

@media (min-width: 768px) {
  .hero h1 { font-size: 3rem; }
  .cta-buttons { flex-direction: row; }
}

/* Footer */
footer {
  background-color: var(--surface);
  padding: 3rem 1rem;
  border-top: 1px solid var(--surface-hover);
}

footer .container {
  max-width: 1280px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.footer-tagline {
  color: var(--muted);
  margin-bottom: 2rem;
  max-width: 400px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 3rem;
}

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

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent2);
}

.copyright {
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--surface-hover);
  padding-top: 1.5rem;
}


/* 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; }