.page-faq {
  --faq-line: 1px solid var(--silver);
  --faq-gap: clamp(20px, 3vw, 34px);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(48px, 8vw, 96px);
}

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

.page-faq .breadcrumb {
  margin: clamp(18px, 2.6vw, 30px) 0 clamp(22px, 3.4vw, 40px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--moss);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(34px, 6.4vw, 72px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__accent {
  color: var(--moss);
}

.page-faq .faq-hero__lede {
  margin: 24px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  color: var(--gray);
}

.page-faq .faq-hero__figure {
  margin: 0;
  background: var(--paper-2);
}

.page-faq .faq-hero__figure img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 问题筛选 ---------- */

.page-faq .faq-board {
  margin-top: clamp(44px, 7vw, 88px);
}

.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: clamp(20px, 3vw, 28px);
  border-bottom: var(--faq-line);
}

.page-faq .faq-filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border: 1px solid var(--silver);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.2;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-chip:hover {
  border-color: var(--moss);
  color: var(--moss);
}

.page-faq .faq-filter-input:checked + .faq-chip {
  background: var(--moss);
  border-color: var(--moss);
  color: var(--paper);
}

.page-faq .faq-filter-input:focus-visible + .faq-chip {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

.page-faq .faq-board:has(#faq-filter-nav:checked) .faq-item:not(.cat-nav),
.page-faq .faq-board:has(#faq-filter-mobile:checked) .faq-item:not(.cat-mobile),
.page-faq .faq-board:has(#faq-filter-feedback:checked) .faq-item:not(.cat-feedback),
.page-faq .faq-board:has(#faq-filter-adapt:checked) .faq-item:not(.cat-adapt) {
  display: none;
}

/* ---------- 问答列表 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(12px, 2vw, 20px);
}

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

.page-faq .faq-item {
  position: relative;
  border-bottom: var(--faq-line);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 20px 4px 20px 18px;
  list-style: none;
  cursor: pointer;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  transition: color 0.16s var(--ease);
}

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: var(--cinnabar);
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::before {
  opacity: 1;
}

.page-faq .faq-item__q:hover {
  color: var(--moss);
}

.page-faq .faq-item__num {
  padding-top: 0.42em;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--gray);
}

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

.page-faq .faq-item__icon {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 0.42em;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--moss);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-item__icon::before {
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__icon::after {
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__icon::before {
  background: var(--cinnabar);
}

.page-faq .faq-item__a {
  padding: 18px 18px 24px;
  background: var(--paper-2);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faqAnswerIn 0.24s var(--ease) both;
}

@keyframes faqAnswerIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 步骤编号 ---------- */

.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .faq-steps__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--moss);
}

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

/* ---------- 侧栏 ---------- */

.page-faq .faq-aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-faq .faq-aside__card {
  padding: 26px 22px 24px;
  background: var(--deep);
  color: var(--paper);
  border: 1px solid var(--deep);
}

.page-faq .faq-aside__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--silver);
}

.page-faq .faq-aside__p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-aside__mail {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--silver);
  word-break: break-all;
}

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

.page-faq .faq-aside__figure {
  margin: 0;
  background: var(--paper-2);
}

.page-faq .faq-aside__figure img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

/* ---------- 底部求助区 ---------- */

.page-faq .faq-help {
  margin-top: clamp(48px, 7vw, 88px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: var(--faq-line);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
}

.page-faq .faq-help__title {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-faq .faq-help__lede {
  margin: 14px 0 22px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--gray);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--faq-line);
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 3em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: var(--faq-line);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-help__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-faq .faq-help__foot {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .faq-help__contact {
  padding: clamp(22px, 3vw, 30px);
  background: var(--moss-tint);
  border-left: 3px solid var(--moss);
}

.page-faq .faq-help__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--moss);
}

.page-faq .faq-help__dl {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  gap: 10px 16px;
  margin: 0 0 18px;
}

.page-faq .faq-help__dl dt {
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

.page-faq .faq-help__dl dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-help__dl dd:nth-of-type(1),
.page-faq .faq-help__dl dd:nth-of-type(2) {
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-faq .faq-help__note {
  margin: 0 0 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(62, 107, 90, 0.28);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-help__actions .btn {
  justify-content: center;
}

.page-faq .link-underline {
  color: var(--moss);
}

/* ---------- 断点 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 96px;
  }
}

@media (max-width: 599px) {
  .page-faq .faq-item__q {
    padding: 18px 2px 18px 14px;
    gap: 10px;
  }

  .page-faq .faq-item__a {
    padding: 16px 14px 20px;
    font-size: 15px;
  }

  .page-faq .faq-steps li {
    grid-template-columns: 2.2em minmax(0, 1fr);
    gap: 8px;
  }

  .page-faq .faq-help__dl {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px 0;
  }

  .page-faq .faq-help__dl dd {
    margin-bottom: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

  .page-faq .faq-chip,
  .page-faq .faq-item__q,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-item__q::before {
    transition: none;
  }
}