:root {
  --bg-color: #0a1118;
  --surface-color: #142230;
  --surface-light: #1e3347;
  --accent-color: #4dd0ff;
  --accent2-color: #ffd166;
  --text-color: #f0faff;
  --muted-color: #8fa8b8;
  --border-color: #263d54;
  --font-display: 'Russo One', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --transition: all 0.3s ease;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: var(--transition);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

h1 { font-size: 2rem; color: var(--text-color); line-height: 1.2; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; color: var(--accent-color); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; color: var(--text-color); margin-bottom: 0.75rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: none;
  transition: var(--transition);
  text-align: center;
  min-height: 44px;
}

.btn-primary {
  background-color: var(--accent2-color);
  color: #000;
}

.btn-primary:hover {
  background-color: #ffde8f;
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 209, 102, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
  background-color: rgba(77, 208, 255, 0.1);
  color: var(--text-color);
  border-color: var(--text-color);
}

/* Header (A1) */
header {
  background-color: rgba(10, 17, 24, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo span {
  color: var(--accent2-color);
}

.nav-links {
  display: none;
  gap: 20px;
}

.nav-links a {
  color: var(--text-color);
  font-weight: 600;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--accent-color);
}

.header-ctas {
  display: none;
  gap: 10px;
}

.mobile-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.8rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
}

.mobile-menu {
  display: none;
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: 20px;
  flex-direction: column;
  gap: 15px;
}

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

.mobile-menu a {
  color: var(--text-color);
  font-weight: 600;
  font-size: 1.1rem;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu .header-ctas {
  display: flex;
  flex-direction: column;
  margin-top: 10px;
}

/* Page Layout */
main {
  padding-bottom: 60px;
}

/* Hero Section */
.hero {
  background: linear-gradient(180deg, var(--surface-color) 0%, var(--bg-color) 100%);
  padding: 40px 0 30px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

/* Kite Motif Decorative */
.hero::before, .hero::after {
  content: '';
  position: absolute;
  width: 60px;
  height: 90px;
  background: var(--accent-color);
  clip-path: polygon(50% 0%, 100% 30%, 50% 100%, 0% 30%);
  opacity: 0.05;
  z-index: 0;
}
.hero::before { top: 20px; left: 10%; transform: rotate(15deg); }
.hero::after { bottom: 10px; right: 10%; transform: rotate(-20deg); background: var(--accent2-color); width: 40px; height: 60px; }

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted-color);
  margin-bottom: 1.5rem;
}

.meta-chips {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.chip {
  background-color: var(--surface-light);
  color: var(--accent-color);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(77, 208, 255, 0.2);
}

/* Content Sections */
.section-wrapper {
  margin-top: 40px;
}

.intro-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 25px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  border-left: 4px solid var(--accent-color);
}

.intro-card p {
  color: var(--text-color);
  font-size: 1.05rem;
}

/* Guide Cards */
.guide-grid {
  display: grid;
  gap: 30px;
  margin-bottom: 50px;
}

.guide-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px 25px;
  position: relative;
  transition: var(--transition);
}

.guide-card:hover {
  border-color: rgba(77, 208, 255, 0.5);
  transform: translateY(-3px);
}

.guide-card h2 {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 1.3rem;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 15px;
  margin-bottom: 20px;
}

.guide-card h2::before {
  content: '';
  display: block;
  width: 24px;
  height: 24px;
  background-color: var(--accent2-color);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  flex-shrink: 0;
}

.guide-card p {
  margin-bottom: 15px;
  color: var(--muted-color);
}

.guide-card p:last-child {
  margin-bottom: 0;
}

.guide-card ul {
  list-style: none;
  margin-top: 15px;
  padding-left: 0;
}

.guide-card ul li {
  position: relative;
  padding-left: 25px;
  margin-bottom: 10px;
  color: var(--muted-color);
}

.guide-card ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-color);
  font-weight: bold;
}

/* FAQ Accordion */
.faq-section {
  margin-bottom: 60px;
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 30px;
  color: var(--text-color);
}

.section-title span {
  color: var(--accent2-color);
}

details {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 12px;
  transition: var(--transition);
}

details:hover {
  border-color: rgba(255, 209, 102, 0.4);
}

summary {
  padding: 18px 20px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text-color);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-color);
  font-family: var(--font-body);
  transition: transform 0.3s ease;
}

details[open] summary::after {
  content: '−';
  color: var(--accent2-color);
}

details[open] summary {
  border-bottom: 1px solid var(--border-color);
  color: var(--accent2-color);
}

details p {
  padding: 20px;
  margin: 0;
  color: var(--muted-color);
}

/* Related Links */
.related-links {
  background-color: var(--surface-light);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  margin-bottom: 60px;
  border: 1px solid var(--border-color);
}

.link-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
  margin-top: 25px;
}

.link-grid a {
  display: inline-block;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 12px 24px;
  border-radius: 30px;
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.95rem;
}

.link-grid a:hover {
  background-color: var(--accent-color);
  color: #000;
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

/* Final CTA */
.final-cta {
  background: linear-gradient(135deg, var(--surface-color) 0%, #0d1a26 100%);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 50px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(77,208,255,0.1) 0%, rgba(0,0,0,0) 70%);
  z-index: 0;
}

.final-cta h2 {
  position: relative;
  z-index: 1;
  font-size: 2rem;
  color: var(--text-color);
  margin-bottom: 10px;
}

.final-cta p {
  position: relative;
  z-index: 1;
  color: var(--muted-color);
  margin-bottom: 30px;
  font-size: 1.1rem;
}

.final-cta .cta-buttons {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer (A2) */
footer {
  background-color: var(--bg-color);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text-color);
  margin-bottom: 15px;
}

.footer-brand span {
  color: var(--accent2-color);
}

.footer-tagline {
  color: var(--muted-color);
  max-width: 300px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.footer-links a {
  color: var(--muted-color);
  font-size: 0.9rem;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--muted-color);
  font-size: 0.85rem;
}

/* Breakpoints */
@media (min-width: 768px) {
  h1 { font-size: 2.5rem; }
  .header-inner { height: 80px; }
  .nav-links, .header-ctas { display: flex; }
  .mobile-toggle { display: none; }
  .footer-grid { grid-template-columns: 1fr 2fr; }
  .footer-links { grid-template-columns: repeat(3, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  h1 { font-size: 3rem; }
  .hero { padding: 60px 0 50px; }
  .footer-links { 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; }