.page-faq {
  --faq-neon-soft: rgba(183, 255, 0, 0.12);
  --faq-neon-line: rgba(183, 255, 0, 0.32);
  --faq-gold-soft: rgba(245, 185, 66, 0.10);
  --faq-gold-line: rgba(245, 185, 66, 0.42);
  position: relative;
  background:
    linear-gradient(rgba(247, 251, 255, 0.016) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 251, 255, 0.016) 1px, transparent 1px),
    var(--ink-base);
  background-size: 44px 44px;
  color: var(--text-primary);
}

/* === Hero === */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4vw, 56px) 0 clamp(36px, 6vw, 72px);
  background:
    radial-gradient(circle at 85% 24%, rgba(183, 255, 0, 0.10), transparent 34%),
    linear-gradient(150deg, var(--ink-panel) 0%, var(--ink-base) 78%);
  border-bottom: 1px solid var(--line-border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(-45deg, transparent 0 14px, rgba(183, 255, 0, 0.03) 14px 15px, transparent 15px 30px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: clamp(20px, 4vw, 48px);
  bottom: clamp(44px, 7vw, 80px);
  z-index: 0;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  opacity: 0;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  pointer-events: none;
}

.page-faq .faq-breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: end;
}

.page-faq .faq-hero-text .section-tag {
  margin-bottom: 14px;
}

.page-faq .faq-hero-text .display-title {
  margin: 0 0 18px;
  max-width: 18ch;
}

.page-faq .faq-hero-text .subtitle {
  margin: 0;
  max-width: 60ch;
  color: var(--text-secondary);
  line-height: 1.8;
}

.page-faq .faq-hero-coord {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  justify-self: start;
  padding: 14px 18px;
  background: rgba(11, 26, 44, 0.72);
  border: 1px solid var(--line-border);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.page-faq .faq-coord-big {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--neon-strike);
  transform: skewX(-6deg);
}

.page-faq .faq-hero-coord p {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* === Body === */
.page-faq .faq-body {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-faq .faq-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}

.page-faq .faq-main {
  min-width: 0;
}

/* === Legend === */
.page-faq .faq-legend {
  padding: 20px;
  margin-bottom: clamp(28px, 4vw, 48px);
  background: var(--ink-panel);
  border: 1px solid var(--line-border);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, 0 100%);
}

.page-faq .faq-legend-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-bottom: 14px;
  color: var(--text-secondary);
  font-size: 0.86rem;
  letter-spacing: 0.06em;
}

.page-faq .faq-legend-hint {
  font-size: 0.8rem;
  letter-spacing: 0;
  opacity: 0.75;
}

.page-faq .faq-legend-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.page-faq .faq-legend-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 14px;
  background: var(--ink-base);
  border: 1px solid var(--line-border);
  border-left: 3px solid var(--neon-strike);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.92rem;
  transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.page-faq .faq-legend-link:hover,
.page-faq .faq-legend-link:focus-visible {
  background: var(--ink-raised);
  border-color: var(--faq-neon-line);
  transform: translateX(4px);
}

.page-faq .faq-legend-code {
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: var(--neon-strike);
  background: var(--faq-neon-soft);
  border: 1px solid var(--faq-neon-line);
  padding: 4px 6px;
  flex-shrink: 0;
}

/* === FAQ Section === */
.page-faq .faq-section {
  scroll-margin-top: 140px;
  margin-bottom: clamp(40px, 6vw, 64px);
}

.page-faq .faq-section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.page-faq .faq-coord {
  flex-shrink: 0;
  margin-top: 4px;
  font-family: var(--font-data);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--neon-strike);
  background: var(--faq-neon-soft);
  border: 1px solid var(--faq-neon-line);
  padding: 8px 10px;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-faq .faq-section-head .section-title {
  margin: 0 0 6px;
  transform: skewX(-2deg);
}

.page-faq .faq-section-desc {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* === Media Panel === */
.page-faq .faq-media-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: 20px;
  margin-bottom: 22px;
  background: var(--ink-base);
  border: 1px solid var(--line-border);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, 0 100%);
}

.page-faq .faq-media-label {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-faq .faq-flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faq-flow;
}

.page-faq .faq-flow-steps li {
  counter-increment: faq-flow;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 0;
  color: var(--text-primary);
  font-size: 0.92rem;
  border-bottom: 1px dashed var(--line-border);
}

.page-faq .faq-flow-steps li:last-child {
  border-bottom: 0;
}

.page-faq .faq-flow-steps li::before {
  content: counter(faq-flow, decimal-leading-zero);
  flex-shrink: 0;
  width: 34px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--neon-strike);
  background: var(--faq-neon-soft);
  border: 1px solid var(--faq-neon-line);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.page-faq .faq-flow-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-panel);
  clip-path: polygon(var(--chamfer) 0, 100% 0, 100% calc(100% - var(--chamfer)), calc(100% - var(--chamfer)) 100%, 0 100%, 0 var(--chamfer));
}

/* === Accordion Items === */
.page-faq .faq-item {
  display: block;
  margin-bottom: 14px;
  background: var(--ink-panel);
  border: 1px solid var(--line-border);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, 0 100%);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-neon-line);
  background: linear-gradient(135deg, var(--ink-panel) 0%, var(--ink-raised) 120%);
}

.page-faq .faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--neon-strike);
  outline-offset: -2px;
}

.page-faq .faq-item:not([open]) summary:hover {
  background: rgba(23, 48, 77, 0.5);
}

.page-faq .faq-item-coord {
  flex-shrink: 0;
  min-width: 44px;
  text-align: center;
  font-family: var(--font-data);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--neon-strike);
  background: var(--faq-neon-soft);
  border: 1px solid var(--faq-neon-line);
  padding: 6px 4px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.page-faq .faq-item[open] .faq-item-coord {
  background: var(--neon-strike);
  border-color: var(--neon-strike);
  color: var(--ink-base);
}

.page-faq .faq-item-title {
  flex: 1;
  min-width: 0;
  color: var(--text-primary);
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.5;
}

.page-faq .faq-item-icon {
  position: relative;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.page-faq .faq-item-icon::before,
.page-faq .faq-item-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--neon-strike);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.page-faq .faq-item-icon::before {
  width: 16px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item-icon::after {
  width: 2px;
  height: 16px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

/* === Answer === */
.page-faq .faq-answer {
  padding: 0 18px 20px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-answer p,
.page-faq .faq-answer li {
  overflow-wrap: anywhere;
}

.page-faq .faq-answer p {
  margin: 0 0 12px;
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer a {
  color: var(--neon-strike);
  text-decoration: underline;
  text-decoration-color: var(--faq-neon-line);
  text-underline-offset: 4px;
  transition: text-decoration-color var(--transition-fast);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  text-decoration-color: var(--neon-strike);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  counter-reset: faq-step;
}

.page-faq .faq-steps li {
  counter-increment: faq-step;
  position: relative;
  padding: 8px 0 8px 42px;
  color: var(--text-secondary);
}

.page-faq .faq-steps li::before {
  content: counter(faq-step);
  position: absolute;
  left: 0;
  top: 8px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--neon-strike);
  background: var(--faq-neon-soft);
  border: 1px solid var(--faq-neon-line);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.page-faq .faq-tip {
  margin: 14px 0 0;
  padding: 12px 16px;
  background: var(--faq-gold-soft);
  border-left: 3px solid var(--gold-accent);
  color: var(--text-secondary);
}

.page-faq .faq-tip-label {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-accent);
}

/* === Security Panel === */
.page-faq .faq-security-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 24px 20px;
  margin-bottom: 22px;
  background: var(--ink-base);
  border: 1px solid var(--line-border);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, 0 100%);
}

.page-faq .faq-security-img {
  width: 200px;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--ink-panel);
  clip-path: polygon(var(--chamfer) 0, 100% 0, 100% calc(100% - var(--chamfer)), calc(100% - var(--chamfer)) 100%, 0 100%, 0 var(--chamfer));
}

.page-faq .faq-security-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-security-text p {
  margin: 8px 0 0;
}

.page-faq .faq-security-badge {
  display: inline-block;
  padding: 6px 12px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gold-accent);
  background: var(--faq-gold-soft);
  border: 1px solid var(--faq-gold-line);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

/* === Contact Strip === */
.page-faq .faq-contact-strip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  padding: 26px 24px;
  margin-top: clamp(8px, 2vw, 16px);
  background: linear-gradient(140deg, var(--ink-raised) 0%, var(--ink-panel) 100%);
  border: 1px solid var(--faq-neon-line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-faq .faq-contact-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.page-faq .faq-contact-info .legend-dot {
  margin-bottom: 6px;
}

.page-faq .faq-contact-info h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--text-primary);
}

.page-faq .faq-contact-info p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.page-faq .faq-contact-info strong {
  color: var(--neon-strike);
  font-weight: 600;
  word-break: break-all;
}

.page-faq .faq-contact-strip .btn {
  flex-shrink: 0;
}

/* === Aside === */
.page-faq .faq-aside {
  display: grid;
  gap: 16px;
}

.page-faq .faq-aside-card {
  padding: 20px;
  background: var(--ink-panel);
  border: 1px solid var(--line-border);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, 0 100%);
}

.page-faq .faq-aside-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--text-primary);
}

.page-faq .faq-aside-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .faq-aside-list li + li {
  border-top: 1px solid var(--line-border);
}

.page-faq .faq-aside-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding: 10px 4px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.page-faq .faq-aside-list a:hover,
.page-faq .faq-aside-list a:focus-visible {
  color: var(--neon-strike);
  padding-left: 10px;
}

.page-faq .faq-aside-list a::after {
  content: "→";
  font-family: var(--font-data);
  color: var(--neon-strike);
  opacity: 0.7;
}

.page-faq .faq-aside-note {
  margin: 12px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-faq .faq-aside-email,
.page-faq .faq-aside-tel {
  color: var(--text-primary);
  word-break: break-all;
}

/* === Desktop Responsive === */
@media (min-width: 640px) {
  .page-faq .faq-legend-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-media-panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-security-panel {
    flex-direction: row;
    text-align: left;
  }

  .page-faq .faq-security-text {
    text-align: left;
  }

  .page-faq .faq-contact-strip {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-faq .faq-hero::after {
    content: "FAQ · 帮助中心坐标索引";
    opacity: 0.5;
  }

  .page-faq .faq-legend-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-columns {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 130px;
  }

  .page-faq .faq-answer {
    padding: 0 18px 20px 74px;
  }
}