.page-faq {
  --faq-line: 6px;
  --faq-badge-size: 34px;
  background-color: var(--c-warm);
  scroll-behavior: smooth;
}

.page-faq .container {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 14px;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-charcoal);
}

.page-faq .breadcrumb a {
  color: var(--c-dark-red);
  text-decoration: none;
  font-weight: 700;
}

.page-faq .breadcrumb a:hover {
  text-decoration: underline;
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--c-dark);
  font-weight: 700;
}

/* 封面区 */
.page-faq .faq-cover {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 28px 0 10px;
  position: relative;
}

.page-faq .faq-cover::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 8px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--c-yellow);
  border: 3px solid var(--c-dark);
  z-index: 0;
}

.page-faq .faq-cover__body {
  position: relative;
  z-index: 1;
}

.page-faq .faq-cover__kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-dark-red);
  background: var(--c-yellow);
  padding: 6px 12px;
  border: 2px solid var(--c-dark);
  transform: rotate(-1deg);
  box-shadow: 3px 3px 0 var(--c-dark);
}

.page-faq .faq-cover__title {
  margin: 18px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.12;
  color: var(--c-dark);
  letter-spacing: 0.01em;
}

.page-faq .faq-cover__lead {
  max-width: 540px;
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-charcoal);
}

.page-faq .faq-cover__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-faq .faq-cover__media {
  margin: 0;
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  background: var(--c-yellow);
  transform: rotate(1deg);
  position: relative;
  z-index: 1;
}

.page-faq .faq-cover__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 问题导航 */
.page-faq .faq-toc {
  margin-top: 34px;
  padding: 20px 0 8px;
  border-top: 2px dashed var(--c-dark);
  border-bottom: 2px dashed var(--c-dark);
}

.page-faq .faq-toc__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 14px;
}

.page-faq .faq-toc__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--c-dark);
}

.page-faq .faq-toc__hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-charcoal);
}

.page-faq .faq-toc__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-faq .faq-toc__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px;
  text-decoration: none;
  border: 3px solid var(--c-dark);
  box-shadow: var(--shadow-small);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.page-faq .faq-toc__item:hover,
.page-faq .faq-toc__item:focus-visible {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 var(--c-dark);
  outline: none;
}

.page-faq .faq-toc__item.is-active {
  outline: 3px solid var(--c-yellow);
  outline-offset: 2px;
}

.page-faq .faq-toc__item--quick {
  background: var(--c-red);
  color: var(--c-white);
}

.page-faq .faq-toc__item--version {
  background: var(--c-navy);
  color: var(--c-white);
}

.page-faq .faq-toc__item--service {
  background: var(--c-yellow);
  color: var(--c-dark);
}

.page-faq .faq-toc__item--privacy {
  background: var(--c-dark);
  color: var(--c-white);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  padding: 2px 6px;
  border: 2px solid currentColor;
  border-radius: 999px;
  line-height: 1;
}

.page-faq .faq-toc__name {
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.1;
  flex: 1;
}

.page-faq .faq-toc__count {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0.85;
}

/* 区块通用 */
.page-faq .faq-section {
  margin-top: 46px;
}

.page-faq .faq-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 4px solid var(--c-dark);
}

.page-faq .faq-section__no {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-yellow);
  background: var(--c-dark);
  border: 2px solid var(--c-dark);
  padding: 4px 10px;
  line-height: 1;
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--c-dark);
}

.page-faq .faq-section__sub {
  margin: 0 0 0 auto;
  font-size: 14px;
  color: var(--c-charcoal);
  max-width: 260px;
  text-align: right;
}

/* 问答列表 */
.page-faq .faq-list {
  display: grid;
  gap: 14px;
}

.page-faq .faq-item {
  background: var(--c-white);
  border: var(--border-thick);
  box-shadow: var(--shadow-small);
  overflow: hidden;
}

.page-faq .faq-item[open] {
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-item__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-dark);
  background: linear-gradient(90deg, transparent 0%, transparent 100%);
  transition: background 0.16s ease;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: 4px solid var(--c-dark);
  outline-offset: -4px;
}

.page-faq .faq-item[open] .faq-item__summary {
  background: var(--c-pale-yellow);
}

.page-faq .faq-item__badge {
  flex-shrink: 0;
  width: var(--faq-badge-size);
  height: var(--faq-badge-size);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-dark);
  background: var(--c-yellow);
  border: 2px solid var(--c-dark);
  box-shadow: 2px 2px 0 var(--c-dark);
}

.page-faq .faq-item__question {
  flex: 1;
}

.page-faq .faq-item__summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--c-red);
  line-height: 1;
  transition: transform 0.18s ease;
}

.page-faq .faq-item[open] .faq-item__summary::after {
  transform: rotate(45deg);
}

.page-faq .faq-item__answer {
  position: relative;
  margin: 0;
  padding: 4px 16px 16px 52px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-charcoal);
}

.page-faq .faq-item__answer p {
  margin: 0;
}

.page-faq .faq-item__answer a {
  color: var(--c-dark-red);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

.page-faq .faq-item__answer::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--c-red);
}

.page-faq .faq-section--quick .faq-item__answer::before {
  background: var(--c-red);
}

.page-faq .faq-section--version .faq-item__answer::before {
  background: var(--c-navy);
}

.page-faq .faq-section--service .faq-item__answer::before {
  background: var(--c-dark-red);
}

.page-faq .faq-section--privacy .faq-item__answer::before {
  background: var(--c-dark);
}

/* 版本区图文布局 */
.page-faq .faq-version__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-faq .faq-version__media {
  margin: 0;
  align-self: start;
  border: var(--border-thick);
  box-shadow: var(--shadow-small);
  background: var(--c-cream);
  transform: rotate(-0.5deg);
}

.page-faq .faq-version__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 联系引导 */
.page-faq .faq-help {
  margin-top: 52px;
  margin-bottom: 48px;
  background: var(--c-dark);
  color: var(--c-white);
  border-top: 8px solid var(--c-red);
  position: relative;
  padding: 26px 20px;
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  right: 18px;
  top: -20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--c-yellow);
  border: 3px solid var(--c-dark);
  box-shadow: 3px 3px 0 var(--c-dark);
}

.page-faq .faq-help__inner {
  max-width: 680px;
}

.page-faq .faq-help__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-yellow);
  text-transform: uppercase;
}

.page-faq .faq-help__title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--c-white);
}

.page-faq .faq-help__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.88);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-help .btn {
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  padding: 10px 18px;
  border: 3px solid var(--c-white);
  display: inline-block;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.page-faq .faq-help .btn:hover,
.page-faq .faq-help .btn:focus-visible {
  transform: translateY(-3px);
}

.page-faq .faq-help .btn--primary {
  background: var(--c-red);
  color: var(--c-white);
  box-shadow: 4px 4px 0 var(--c-yellow);
}

.page-faq .faq-help .btn--ghost {
  background: transparent;
  color: var(--c-white);
  box-shadow: 4px 4px 0 var(--c-dark-red);
}

/* 桌面端 */
@media (min-width: 768px) {
  .page-faq .container {
    padding-inline: 24px;
  }

  .page-faq .faq-cover {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 40px;
    align-items: center;
    padding-top: 36px;
  }

  .page-faq .faq-cover__media {
    transform: rotate(1.5deg);
  }

  .page-faq .faq-toc__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-faq .faq-toc__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 18px 16px;
  }

  .page-faq .faq-toc__name {
    font-size: 17px;
  }

  .page-faq .faq-section__title {
    font-size: 30px;
  }

  .page-faq .faq-item__summary {
    padding: 18px 20px;
    font-size: 16px;
  }

  .page-faq .faq-item__answer {
    padding: 6px 24px 20px 66px;
    font-size: 16px;
  }

  .page-faq .faq-item__answer::before {
    left: 32px;
  }

  .page-faq .faq-version__layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-help {
    padding: 36px 40px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-cover__title {
    font-size: 56px;
  }

  .page-faq .faq-cover__media {
    width: 400px;
    justify-self: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq,
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}