.page-faq {
  --faq-rule: rgba(12, 38, 33, .18);
  --faq-paper: var(--paper);
  --faq-paper-ink: var(--ink);
  display: block;
  padding-bottom: clamp(48px, 6vw, 88px);
}

.page-faq__crumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  padding: clamp(22px, 4vw, 40px) 0 clamp(28px, 4vw, 48px);
  border-bottom: 2px solid var(--line);
}

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

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(32px, 5.4vw, 66px);
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.85;
  color: var(--paper-2);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  padding: 20px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-stat {
  min-width: 0;
  padding-left: 12px;
  border-left: 3px solid var(--gold);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold-bright);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-lt);
}

/* ---------- 两栏布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(32px, 4vw, 56px);
}

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

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  padding: 18px 18px 20px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-bright);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold);
}

.page-faq .faq-index__group + .faq-index__group {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-index__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  padding: 7px 8px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper-2);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: #FFFFFF;
  background: rgba(232, 202, 132, .12);
  border-left-color: var(--gold-bright);
}

.page-faq .faq-index__list a .num {
  font-size: 12px;
  color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(40px, 5vw, 68px);
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding-top: 14px;
  margin-bottom: 20px;
  border-top: 3px solid var(--gold);
}

.page-faq .faq-sec__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold-bright);
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.2;
  color: var(--paper);
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-item {
  scroll-margin-top: calc(var(--header-h) + 16px);
  min-width: 0;
}

.page-faq .faq-item + .faq-item {
  margin-top: 14px;
}

.page-faq .qa {
  background: var(--faq-paper);
  color: var(--faq-paper-ink);
  border: 2px solid var(--gold);
  box-shadow: var(--shadow-hard);
  transition: border-color .16s ease, box-shadow .16s ease;
}

.page-faq .qa[open] {
  box-shadow: 8px 8px 0 rgba(5, 17, 14, .9);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  border-top: 3px solid var(--gold);
  transition: border-top-width .16s ease, background-color .16s ease;
}

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

.page-faq .qa__q:hover {
  background: rgba(192, 151, 63, .14);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: -3px;
}

.page-faq .qa[open] > .qa__q {
  border-top-width: 6px;
}

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--pen);
}

.page-faq .qa__text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 1.7vw, 20px);
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .qa__sign {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--ink);
  transition: transform .16s ease, opacity .16s ease;
}

.page-faq .qa__sign::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .qa__sign::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 14px 18px 18px;
  border-top: 1px dotted var(--faq-rule);
}

.page-faq .qa__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .qa__body p + p {
  margin-top: 10px;
}

.page-faq .qa-field {
  font-family: var(--font-mono);
  font-size: .84em;
  padding: 1px 6px 2px;
  background: var(--ink-2);
  color: var(--gold-bright);
  border-left: 2px solid var(--gold);
  white-space: nowrap;
}

.page-faq .faq-item:target > .qa {
  border-color: var(--gold-bright);
  box-shadow: 0 0 0 3px rgba(232, 202, 132, .4), var(--shadow-hard);
}

/* ---------- 图文并排 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-faq .faq-figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line);
}

.page-faq .faq-frame--5x3 {
  aspect-ratio: 5 / 3;
}

.page-faq .faq-frame--3x2 {
  aspect-ratio: 3 / 2;
}

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

/* ---------- 联系收束 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-contact__card {
  min-width: 0;
  padding: clamp(18px, 3vw, 28px);
  background: var(--ink-2);
  border: 2px solid var(--gold);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-contact__card .qa {
  box-shadow: 4px 4px 0 rgba(5, 17, 14, .9);
}

.page-faq .faq-contact__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0 0;
}

.page-faq .faq-contact__list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .faq-contact__list dd {
  margin: 4px 0 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__list dd a {
  color: var(--gold-bright);
}

.page-faq .faq-contact__note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-lt);
}

.page-faq .faq-contact__card .btn {
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) and (max-width: 1023px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: 24px;
  }

  .page-faq .faq-split .faq-item + .faq-item {
    margin-top: 0;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: stretch;
  }

  .page-faq .faq-contact .faq-frame {
    height: 100%;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(300px, .85fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    max-height: calc(100vh - var(--header-h) - 44px);
    overflow: auto;
  }
}