.page-faq {
  --faq-orange-glow: rgba(255, 106, 0, 0.16);
  --faq-blue-glow: rgba(0, 212, 255, 0.16);
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

/* ========== 帮助中心首屏 ========== */
.page-faq .help-hero {
  position: relative;
  padding: clamp(32px, 6vw, 68px) 0 44px;
  background:
    radial-gradient(ellipse at 82% 16%, var(--faq-orange-glow), transparent 48%),
    radial-gradient(ellipse at 8% 82%, var(--faq-blue-glow), transparent 55%),
    var(--color-bg-deep);
  border-bottom: 2px solid var(--color-divider);
  overflow: hidden;
}
.page-faq .help-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(0, 212, 255, 0.08) 60%, rgba(255, 106, 0, 0.12) 100%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 12% 100%);
  pointer-events: none;
}
.page-faq .help-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 16px;
  background: linear-gradient(96deg, var(--color-accent-blue) 0%, var(--color-accent-blue-soft) 45%, var(--color-accent-orange) 100%);
  clip-path: polygon(0 0, 92% 0, 100% 100%, 4% 100%);
  z-index: 0;
}
.page-faq .help-hero .container-wide {
  position: relative;
  z-index: 1;
}

.page-faq .help-hero-grid {
  display: grid;
  gap: 28px;
}

.page-faq .help-title {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
}
.page-faq .help-lead {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text-dim);
  max-width: 62ch;
  margin: 0;
}

.page-faq .help-stats-wrap {
  display: flex;
  align-items: flex-end;
}
.page-faq .help-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
}
.page-faq .stat-badge {
  background: var(--color-bg-surface);
  border: 2px solid var(--color-divider);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.35);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent-blue);
}
.page-faq .stat-badge span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text-dim);
}

.page-faq .help-tabs-strip {
  margin-top: clamp(28px, 5vw, 44px);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  position: relative;
  z-index: 2;
}
.page-faq .help-tab {
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  padding: 10px 16px;
  background: transparent;
  border: 2px solid var(--color-divider);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.page-faq .help-tab:hover,
.page-faq .help-tab:focus-visible {
  background: var(--color-accent-blue);
  border-color: var(--color-accent-blue);
  color: var(--color-bg-deep);
  transform: translateY(-2px);
}

/* ========== 手风琴区块 ========== */
.page-faq .qa-section {
  position: relative;
  padding: clamp(44px, 6vw, 72px) 0;
  border-bottom: 2px solid var(--color-divider);
  scroll-margin-top: 24px;
}
.page-faq .qa-section--alt {
  background: linear-gradient(180deg, rgba(15, 45, 40, 0) 0%, rgba(15, 45, 40, 0.5) 8%, rgba(15, 45, 40, 0.5) 92%, rgba(15, 45, 40, 0) 100%);
}
.page-faq .qa-section--contact {
  background: linear-gradient(180deg, transparent, rgba(255, 106, 0, 0.06));
}

.page-faq .qa-section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
}
.page-faq .qa-index {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent-orange);
  border: 2px solid var(--color-accent-orange);
  padding: 4px 8px;
  line-height: 1;
  white-space: nowrap;
  margin-top: 6px;
}
.page-faq .qa-section h2 {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 3vw, 2.375rem);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.page-faq .qa-section-desc {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 1rem;
  line-height: 1.6;
}

/* ========== 图文双栏 ========== */
.page-faq .qa-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-faq .faq-figure {
  margin: 0;
  background: var(--color-bg-deep);
  border: 2px solid var(--color-divider);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.35);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  padding: 12px 14px;
  border-top: 2px solid var(--color-divider);
  font-size: 0.875rem;
  color: var(--color-text-dim);
}

/* ========== 手风琴样式 ========== */
.page-faq .qa-item {
  background: var(--color-bg-surface);
  border: 2px solid var(--color-divider);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.25);
  margin-bottom: 12px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.page-faq .qa-item[open] {
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
}
.page-faq .qa-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
  position: relative;
}
.page-faq .qa-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .qa-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.375rem;
  line-height: 1;
  color: var(--color-accent-blue);
  transition: transform 0.25s ease, color 0.25s ease;
}
.page-faq .qa-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--color-accent-orange);
}
.page-faq .qa-item summary:focus-visible {
  outline: 3px solid var(--color-accent-blue);
  outline-offset: -3px;
}
.page-faq .qa-answer {
  padding: 14px 20px 18px;
  border-top: 1px solid var(--color-divider);
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  line-height: 1.75;
}
.page-faq .qa-answer p {
  margin: 0 0 10px;
}
.page-faq .qa-answer p:last-child {
  margin-bottom: 0;
}
.page-faq .qa-answer a {
  color: var(--color-accent-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ========== 更新数据带 ========== */
.page-faq .update-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 36px;
}
.page-faq .update-metric {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  background: var(--color-bg-deep);
  border: 2px solid var(--color-divider);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-accent-orange);
}
.page-faq .update-metric span {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-dim);
}

/* ========== 版本演进条 ========== */
.page-faq .version-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 28px;
  align-items: center;
}
.page-faq .version-strip span,
.page-faq .version-strip strong {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  border: 1px solid var(--color-divider);
  padding: 6px 10px;
}
.page-faq .version-strip strong {
  color: var(--color-accent-orange);
  border-color: var(--color-accent-orange);
}

/* ========== 联系信息卡 ========== */
.page-faq .help-contact-strip {
  display: grid;
  gap: 14px;
  margin-top: 36px;
}
.page-faq .contact-block {
  background: linear-gradient(135deg, var(--color-bg-deep), var(--color-bg-surface));
  border: 2px solid var(--color-divider);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.35);
  padding: 20px 22px;
  position: relative;
  overflow: hidden;
}
.page-faq .contact-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--color-accent-orange);
}
.page-faq .contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent-blue);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.page-faq .contact-value {
  display: block;
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-text);
}
.page-faq .contact-note {
  display: inline-block;
  margin-top: 8px;
  font-style: normal;
  font-size: 0.8125rem;
  color: var(--color-accent-orange-soft);
}

/* ========== 底部信任条 ========== */
.page-faq .help-callout {
  padding: 44px 0;
  background:
    linear-gradient(100deg, rgba(0, 212, 255, 0.08), transparent),
    var(--color-bg-deep);
  border-top: 2px solid var(--color-divider);
}
.page-faq .help-callout-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}
.page-faq .help-callout-text {
  margin: 0;
  color: var(--color-text-dim);
  line-height: 1.7;
  max-width: 58ch;
}
.page-faq .help-callout-text strong {
  color: var(--color-text);
}

/* ========== 响应式布局 ========== */
@media (min-width: 640px) {
  .page-faq .help-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-faq .update-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-faq .help-contact-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 700px) {
  .page-faq .help-callout-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 880px) {
  .page-faq .qa-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
  }
  .page-faq .qa-grid--reverse .faq-figure {
    order: -1;
  }
  .page-faq .qa-list--split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-faq .help-hero-grid {
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 40px;
  }
}

@media (min-width: 1000px) {
  .page-faq .help-contact-strip {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1140px) {
  .page-faq .help-hero {
    padding-top: 72px;
  }
  .page-faq .qa-section {
    padding: 88px 0;
  }
}