.page-faq {
  --faq-rule: rgba(16, 22, 28, 0.14);
  --faq-rule-soft: rgba(16, 22, 28, 0.08);
  --faq-sticky: clamp(92px, 14vh, 140px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4vw, 46px) clamp(52px, 7vw, 96px);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -16%;
  bottom: -48%;
  width: min(64%, 620px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 34%, rgba(255, 106, 26, 0.2), rgba(255, 106, 26, 0) 64%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.78fr);
    align-items: end;
  }
}

.page-faq .faq-title {
  margin: 10px 0 0;
  font-size: clamp(46px, 9vw, 104px);
  font-weight: 200;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-lead {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-fact {
  background: var(--ink-blue);
  padding: 16px 14px 18px;
}

.page-faq .faq-fact dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--silver);
}

.page-faq .faq-fact dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-faq .faq-fact dd span {
  margin-left: 4px;
  font-size: 0.52em;
  font-weight: 400;
  color: var(--orange-soft);
}

/* ---------- 阅读带与栅格 ---------- */

.page-faq .faq-body {
  padding-block: var(--section-y);
  background: var(--paper);
  color: var(--ink-black);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 60px);
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
    gap: clamp(40px, 5vw, 84px);
  }
}

/* ---------- 分类索引 ---------- */

.page-faq .faq-index {
  border-top: 2px solid var(--ink-black);
  padding-top: 14px;
}

@media (min-width: 980px) {
  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--ink-quiet);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

@media (min-width: 980px) {
  .page-faq .faq-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 10px;
  border-left: 3px solid transparent;
  color: var(--ink-quiet);
  text-decoration: none;
  font-size: var(--fs-14);
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--ink-black);
  border-left-color: var(--orange);
  background: rgba(16, 22, 28, 0.05);
  outline: none;
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--ink-quiet);
}

.page-faq .faq-index-link:hover .faq-index-num,
.page-faq .faq-index-link:focus-visible .faq-index-num {
  color: var(--orange);
}

.page-faq .faq-index-note {
  margin: 14px 0 0;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--ink-quiet);
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 78px);
  padding-top: clamp(36px, 5vw, 58px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  margin-bottom: clamp(14px, 2vw, 24px);
}

.page-faq .faq-group-num {
  align-self: start;
  padding: 4px 10px 5px;
  background: var(--ink-blue);
  color: var(--paper);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink-black);
}

.page-faq .faq-group-desc {
  grid-column: 2;
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-quiet);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
}

.page-faq .faq-item {
  border-top: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0 14px;
  align-items: baseline;
  padding: 20px 0;
  list-style: none;
  cursor: pointer;
  color: var(--ink-black);
}

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

.page-faq .faq-q::after {
  content: "−";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--ink-quiet);
}

.page-faq .faq-item:not([open]) .faq-q::after {
  content: "+";
  color: var(--green);
}

.page-faq .faq-q:hover .faq-q-text {
  color: #000;
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-faq .faq-q-mark {
  padding: 1px 5px 2px;
  border: 1px solid var(--orange);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  line-height: 1.2;
  transform: translateY(-2px);
}

.page-faq .faq-q-text {
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.005em;
}

.page-faq .faq-a {
  padding: 0 0 24px 34px;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.82;
  color: var(--ink-quiet);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a .link {
  color: var(--ink-black);
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

.page-faq .faq-mark {
  display: inline-block;
  margin: 0 2px;
  padding: 1px 7px 2px;
  background: var(--orange);
  color: var(--ink-blue);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.92em;
  font-weight: 700;
  white-space: nowrap;
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: clamp(18px, 2.4vw, 28px) 0 0 34px;
  max-width: 720px;
}

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

/* ---------- 联系条 ---------- */

.page-faq .faq-contact {
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(16, 22, 28, 0.05);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 0 0 10px;
}

.page-faq .faq-contact-label {
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--ink-quiet);
}

.page-faq .faq-contact-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--ink-black);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 12px 0 0;
  font-size: var(--fs-12);
  line-height: 1.75;
  color: var(--ink-quiet);
}

.page-faq .faq-contact-note .link {
  color: var(--ink-black);
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

/* ---------- 页尾承接区 ---------- */

.page-faq .faq-tail {
  padding-block: clamp(44px, 6vw, 78px);
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-tail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
}

@media (min-width: 820px) {
  .page-faq .faq-tail-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, auto);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
}

.page-faq .faq-tail-title {
  margin: 10px 0 0;
  max-width: 24ch;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 300;
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-tail-text {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
}

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

/* ---------- 窄屏收口 ---------- */

@media (max-width: 640px) {
  .page-faq .faq-a,
  .page-faq .faq-figure {
    padding-left: 0;
    margin-left: 0;
  }

  .page-faq .faq-contact-line {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .page-faq .faq-contact-label {
    min-width: 0;
  }

  .page-faq .faq-index-link {
    white-space: normal;
  }
}