:root {
  --bg: #1a0a14;
  --surface: #301828;
  --accent: #ff6b9d;
  --accent2: #4dd0ff;
  --text: #fff0f8;
  --muted: #c295b2;
  --font-display: 'Anton', sans-serif;
  --font-body: 'Barlow', sans-serif;
  --radius: 12px;
  --shadow-pop: 6px 6px 0px var(--accent2);
  --shadow-pop-hover: 8px 8px 0px var(--accent);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  background-image: radial-gradient(var(--surface) 2px, transparent 2px);
  background-size: 30px 30px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent2);
  text-decoration: none;
  transition: var(--transition);
}

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

h1, h2, h3, .display-text {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition);
  text-decoration: none;
  min-height: 44px;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  box-shadow: 4px 4px 0px var(--accent2);
}

.btn-primary:hover {
  background-color: var(--accent2);
  border-color: var(--accent2);
  box-shadow: 4px 4px 0px var(--accent);
  color: var(--bg);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: var(--accent);
  color: var(--bg);
  box-shadow: 4px 4px 0px var(--accent2);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.3rem;
}

/* HEADER (Part A1 styling) */
header {
  background-color: var(--surface);
  border-bottom: 3px solid var(--accent);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo-area a {
  display: block;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  color: var(--text);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent2);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.header-ctas {
  display: flex;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--accent);
  font-size: 2rem;
  cursor: pointer;
  padding: 5px;
  min-width: 44px;
  min-height: 44px;
}

/* HERO SECTION */
.hero-faq {
  padding: 60px 0 40px;
  text-align: center;
  background: linear-gradient(135deg, rgba(48,24,40,0.8) 0%, rgba(26,10,20,0.95) 100%);
  border-bottom: 4px dashed var(--muted);
  margin-bottom: 50px;
  position: relative;
}

.hero-faq::before {
  content: '';
  position: absolute;
  top: -20px;
  left: -20px;
  width: 100px;
  height: 100px;
  background-color: var(--accent);
  border-radius: 50%;
  filter: blur(60px);
  z-index: -1;
  opacity: 0.5;
}

.hero-faq::after {
  content: '';
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 150px;
  height: 150px;
  background-color: var(--accent2);
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.4;
}

.breadcrumb {
  display: inline-block;
  background-color: var(--surface);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid var(--accent2);
}

.hero-faq h1 {
  font-size: 4rem;
  color: var(--accent);
  text-shadow: 3px 3px 0px var(--accent2), 6px 6px 0px var(--bg);
  margin-bottom: 24px;
}

.meta-chips {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.chip {
  background-color: var(--accent2);
  color: var(--bg);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 4px;
  text-transform: uppercase;
  box-shadow: 2px 2px 0px var(--accent);
}

/* INTRO SECTION */
.intro-section {
  margin-bottom: 60px;
}

.intro-box {
  background-color: var(--surface);
  padding: 30px 40px;
  border-left: 8px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.15rem;
  line-height: 1.8;
  box-shadow: var(--shadow-pop);
  position: relative;
}

.intro-box::before {
  content: '"';
  font-family: var(--font-display);
  font-size: 6rem;
  color: var(--accent2);
  position: absolute;
  top: -20px;
  left: 20px;
  opacity: 0.3;
  line-height: 1;
}

/* MAIN CONTENT - GUIDE CARDS */
.guide-sections {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-bottom: 80px;
}

.guide-card {
  background-color: var(--surface);
  border: 2px solid var(--muted);
  border-radius: var(--radius);
  padding: 40px;
  position: relative;
  transition: var(--transition);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 30px;
}

.guide-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-pop-hover);
  transform: translateY(-4px);
}

.card-number {
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--bg);
  -webkit-text-stroke: 2px var(--accent2);
  line-height: 1;
  text-shadow: 4px 4px 0px var(--accent);
}

.card-content h2 {
  font-size: 2rem;
  color: var(--text);
  margin-bottom: 20px;
  border-bottom: 2px solid rgba(255,107,157,0.3);
  padding-bottom: 10px;
}

.card-content p {
  margin-bottom: 16px;
  color: var(--muted);
}

.card-content p:last-of-type {
  margin-bottom: 24px;
}

.pop-list {
  list-style: none;
}

.pop-list li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 12px;
  color: var(--text);
  font-weight: 500;
}

.pop-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  background-color: var(--accent2);
  border-radius: 3px;
  transform: rotate(45deg);
}

/* FAQ ACCORDION */
.faq-accordion {
  margin-bottom: 80px;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  color: var(--accent2);
  margin-bottom: 40px;
  text-shadow: 2px 2px 0px var(--accent);
}

.accordion-wrapper {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details {
  background-color: var(--surface);
  border: 2px solid var(--muted);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

details[open] {
  border-color: var(--accent);
  box-shadow: 4px 4px 0px var(--accent2);
}

summary {
  padding: 20px 24px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(26,10,20,0.3);
}

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

summary::after {
  content: '+';
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
  transition: transform 0.3s ease;
}

details[open] summary::after {
  content: '-';
  color: var(--accent2);
  transform: rotate(180deg);
}

.details-content {
  padding: 0 24px 24px;
  color: var(--muted);
  border-top: 1px dashed rgba(194,149,178,0.2);
  margin-top: 10px;
  padding-top: 20px;
}

/* RELATED LINKS */
.related-links {
  margin-bottom: 80px;
  text-align: center;
}

.link-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.rel-link {
  display: inline-block;
  background-color: var(--bg);
  border: 2px solid var(--accent2);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 30px;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.rel-link:hover {
  background-color: var(--accent2);
  color: var(--bg);
  box-shadow: 3px 3px 0px var(--accent);
  transform: scale(1.05);
}

/* BOTTOM CTA */
.bottom-cta {
  margin-bottom: 80px;
}

.cta-box {
  background: linear-gradient(45deg, var(--accent) 0%, var(--surface) 100%);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  box-shadow: 8px 8px 0px var(--accent2);
  border: 3px solid var(--bg);
}

.cta-box h2 {
  font-size: 3rem;
  color: var(--bg);
  margin-bottom: 16px;
  text-shadow: 2px 2px 0px rgba(255,255,255,0.5);
}

.cta-box p {
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 32px;
  font-weight: 600;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-box .btn-primary {
  background-color: var(--bg);
  color: var(--accent);
  border-color: var(--bg);
  box-shadow: 4px 4px 0px rgba(0,0,0,0.5);
}

.cta-box .btn-primary:hover {
  background-color: var(--accent2);
  color: var(--bg);
}

.cta-box .btn-secondary {
  border-color: var(--bg);
  color: var(--bg);
}

.cta-box .btn-secondary:hover {
  background-color: var(--bg);
  color: var(--accent);
}

/* FOOTER (Part A2 styling) */
footer {
  background-color: var(--surface);
  border-top: 4px solid var(--accent2);
  padding: 60px 0 20px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .display-text {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 16px;
}

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

.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.footer-col h3 {
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 20px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 5px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--muted);
  font-weight: 500;
}

.footer-col ul li a:hover {
  color: var(--accent2);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(194,149,178,0.2);
  color: var(--muted);
  font-size: 0.9rem;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .guide-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .card-number {
    font-size: 3rem;
    position: absolute;
    top: -20px;
    right: 20px;
    background: var(--surface);
    padding: 0 10px;
  }
}

@media (max-width: 768px) {
  .nav-links, .header-ctas {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--surface);
    padding: 20px;
    border-bottom: 3px solid var(--accent);
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
  }

  .header-ctas.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(80px + 240px); /* Approx below nav */
    left: 0;
    width: 100%;
    background-color: var(--surface);
    padding: 0 20px 20px;
    border-bottom: 3px solid var(--accent);
  }

  .hero-faq h1 {
    font-size: 2.5rem;
  }

  .intro-box {
    padding: 20px;
    font-size: 1rem;
  }

  .footer-links-grid {
    grid-template-columns: 1fr;
  }

  .cta-box h2 {
    font-size: 2rem;
  }
}

@media (max-width: 390px) {
  .hero-faq h1 {
    font-size: 2rem;
  }
  .card-content h2 {
    font-size: 1.5rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .cta-buttons {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .guide-card {
    padding: 24px;
  }
}


/* 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; }