.page-faq {
  color-scheme: light;
  background: var(--paper);
  color: var(--ink);
}

/* ===================== Hero ===================== */
.page-faq__hero {
  background: var(--ink);
  color: var(--white);
  padding-top: calc(var(--header-h) + 44px);
  padding-bottom: 72px;
  position: relative;
  overflow: hidden;
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  right: -40px;
  top: 80px;
  width: 140px;
  height: 220px;
  background: var(--red);
  transform: rotate(18deg);
  opacity: 0.9;
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  left: 8%;
  bottom: -70px;
  width: 280px;
  height: 80px;
  background: var(--gold);
  transform: skewX(-24deg);
  opacity: 0.35;
  pointer-events: none;
}

.page-faq__hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-faq__breadcrumbs {
  margin-bottom: 24px;
}

.page-faq__hero .breadcrumbs a {
  color: var(--gold);
  text-decoration: none;
}

.page-faq__hero .breadcrumbs a:hover {
  text-decoration: underline;
}

.page-faq__hero .breadcrumbs__item[aria-current="page"] {
  color: var(--gray);
}

.page-faq__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  line-height: 1.05;
  transform: skewX(-4deg);
  color: var(--white);
  margin: 0 0 18px;
}

.page-faq__lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--gray);
  max-width: 36em;
  margin: 0;
}

.page-faq__hero-side {
  background: var(--gold);
  color: var(--ink);
  min-height: 170px;
  padding: 30px 24px;
  clip-path: polygon(14% 0, 100% 0, 86% 100%, 0 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  gap: 8px;
  transform: skewX(-5deg);
}

.page-faq__hero-side > * {
  transform: skewX(5deg);
}

.page-faq__hero-side-text {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 0.95;
  text-align: right;
}

.page-faq__hero-side-index {
  font-family: var(--font-data);
  font-size: 1rem;
  letter-spacing: 0.4em;
  border-top: 3px solid var(--ink);
  padding-top: 8px;
}

/* ===================== 主体布局 ===================== */
.page-faq__body {
  padding: var(--gutter) 0 96px;
  border-top: 4px solid var(--black);
  background: var(--paper);
}

.page-faq__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

/* ===================== 側边栏 ===================== */
.page-faq__sidebar-inner {
  background: var(--ink);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-hard);
  padding: 24px 20px;
  color: var(--white);
}

.page-faq__sidebar-label {
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--gold);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 10px;
  margin-bottom: 6px;
}

.page-faq__cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq__cat-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 8px;
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  transition: background-color 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
}

.page-faq__cat-link:hover,
.page-faq__cat-link:focus-visible {
  background: var(--gold);
  color: var(--ink);
  padding-left: 12px;
  outline: none;
}

.page-faq__cat-num {
  font-family: var(--font-data);
  font-size: 1.15rem;
  color: var(--gold);
  transition: color 0.2s ease;
}

.page-faq__cat-link:hover .page-faq__cat-num,
.page-faq__cat-link:focus-visible .page-faq__cat-num {
  color: var(--ink);
}

.page-faq__sidebar-note {
  margin-top: 28px;
  background: var(--ink-2);
  border: 2px solid var(--gold);
  padding: 18px 16px;
}

.page-faq__sidebar-note-title {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--gold);
  font-size: 1rem;
  margin: 0 0 6px;
}

.page-faq__sidebar-note-text {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--gray);
  font-family: var(--font-body);
  margin: 0 0 14px;
}

.page-faq__sidebar-btn {
  width: 100%;
  justify-content: center;
}

/* ===================== 分组标题 ===================== */
.page-faq__group {
  scroll-margin-top: calc(var(--header-h) + 20px);
  margin-top: 72px;
  padding-top: 8px;
}

.page-faq__group:first-of-type {
  margin-top: 0;
}

.page-faq__group-head {
  display: flex;
  align-items: center;
  gap: 18px;
  border-bottom: 4px solid var(--black);
  padding-bottom: 14px;
  margin-bottom: 32px;
  position: relative;
}

.page-faq__group-num {
  font-family: var(--font-data);
  font-size: 2.6rem;
  line-height: 1;
  font-weight: 700;
  color: var(--gold);
  background: var(--ink);
  border: 3px solid var(--black);
  box-shadow: 5px 5px 0 var(--gold);
  padding: 12px 16px;
  flex-shrink: 0;
}

.page-faq__group-kicker {
  font-family: var(--font-head);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 4px;
}

.page-faq__group:nth-child(even) .page-faq__group-kicker {
  color: var(--red);
}

.page-faq__group-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.2;
  transform: skewX(-3deg);
  margin: 0;
}

.page-faq__group-annot {
  margin-left: auto;
  color: var(--blue-gray);
  flex-shrink: 0;
}

/* ===================== 手风琴 ===================== */
.page-faq__item {
  background: var(--white);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-hard);
  margin-bottom: 20px;
}

.page-faq__q {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-faq__q::-webkit-details-marker,
.page-faq__q::marker {
  content: none;
  display: none;
}

.page-faq__q-icon {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  background: var(--gold);
  border: 2px solid var(--black);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  transition: transform 0.3s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-faq__q-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.45;
  margin: 0;
}

.page-faq__item:not([open]) .page-faq__q:hover,
.page-faq__item:not([open]) .page-faq__q:focus-within {
  background: var(--ink-2);
  color: var(--white);
}

.page-faq__item[open] .page-faq__q {
  background: var(--ink);
  color: var(--white);
}

.page-faq__item[open] .page-faq__q-icon {
  transform: rotate(45deg);
  background: var(--red);
  color: var(--white);
}

.page-faq__q:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: -3px;
}

.page-faq__a {
  border-top: 3px solid var(--black);
  background: var(--paper-deep);
  padding: 20px 20px 24px;
  animation: page-faq-reveal 0.28s ease-out;
}

@keyframes page-faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq__a-text {
  font-family: var(--font-body);
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--ink);
  margin: 0;
}

.page-faq__a-text + .page-faq__a-text {
  margin-top: 12px;
}

.page-faq__a-text a {
  color: var(--red);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.page-faq__a-text a:hover {
  color: var(--ink);
}

/* ===================== 使用指南配图 ===================== */
.page-faq__guide-media {
  margin-top: 40px;
  background: var(--ink);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-hard);
  padding: 14px;
}

.page-faq__guide-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-2);
}

.page-faq__guide-media figcaption {
  margin-top: 12px;
  color: var(--gold);
  font-family: var(--font-head);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  padding: 0 4px 2px;
}

/* ===================== 联系支持卡片 ===================== */
.page-faq__contact-card {
  margin-top: 40px;
  background: var(--ink);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px;
  padding: 28px;
  color: var(--white);
}

.page-faq__contact-info {
  flex: 1 1 260px;
  min-width: 240px;
}

.page-faq__contact-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.25rem;
  margin: 0 0 8px;
  color: var(--white);
  border-bottom: 3px solid var(--gold);
  display: inline-block;
  padding-bottom: 4px;
}

.page-faq__contact-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq__contact-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding-block: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  font-family: var(--font-body);
  font-size: 0.98rem;
}

.page-faq__contact-list li:last-child {
  border-bottom: 0;
}

.page-faq__contact-label {
  min-width: 88px;
  font-family: var(--font-head);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 2px;
}

.page-faq__contact-note {
  width: 100%;
  margin: 16px 0 0;
  font-size: 0.86rem;
  color: var(--gray);
  line-height: 1.7;
  border-left: 3px solid var(--gold);
  padding-left: 12px;
}

.page-faq__contact-visual {
  flex: 0 0 auto;
  margin-left: auto;
}

.page-faq__contact-visual img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 3px solid var(--gold);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
  background: var(--ink-2);
}

/* ===================== 媒体查询 ===================== */
@media (max-width: 899px) {
  .page-faq__sidebar {
    order: -1;
  }

  .page-faq__cat-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .page-faq__cat-list li {
    flex: 1 1 auto;
  }

  .page-faq__cat-link {
    justify-content: center;
    border: 2px solid var(--gold);
    padding: 10px 14px;
    border-bottom: 2px solid var(--gold);
  }

  .page-faq__cat-num {
    display: none;
  }

  .page-faq__sidebar-note {
    margin-top: 20px;
  }

  .page-faq__group-annot {
    display: none;
  }

  .page-faq__contact-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-faq__contact-visual {
    margin-left: 0;
  }

  .page-faq__hero-side {
    min-height: 140px;
    clip-path: polygon(0 0, 100% 0, 94% 100%, 6% 100%);
    transform: none;
    padding: 24px;
  }

  .page-faq__hero-side > * {
    transform: none;
  }
}

@media (min-width: 900px) {
  .page-faq__hero-inner {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: stretch;
  }

  .page-faq__layout {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq__sidebar-inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}