.page-faq {
  --faq-sticky: calc(var(--bar-h) + 20px);
  --faq-rail: clamp(220px, 22vw, 268px);
  display: block;
  overflow-x: clip;
}

/* ---------- 面包屑与首屏 ---------- */

.page-faq .phx-crumbs {
  padding-block: 16px 0;
}

.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  padding-block: clamp(20px, 3.5vw, 36px) clamp(30px, 5vw, 58px);
  border-bottom: var(--line-w) solid var(--c-line);
}

.page-faq .faq-hero__title {
  margin: 12px 0 16px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-bone);
  max-width: 20ch;
}

.page-faq .faq-hero__text .phx-lede {
  max-width: 40em;
  color: var(--c-ink);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: var(--line-w) solid var(--c-line);
  background: var(--c-surface);
  color: var(--c-ink);
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__meta .phx-data {
  color: var(--c-orange);
  font-size: 14px;
}

/* ---------- 图片容器 ---------- */

.page-faq .faq-figure {
  margin: 0;
  border: var(--line-w) solid var(--c-line);
  background: var(--c-surface);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

.page-faq .faq-hero__figure {
  align-self: end;
  min-width: 0;
}

.page-faq .faq-figure--square {
  max-width: 380px;
  margin-bottom: 26px;
}

/* ---------- 主体双栏 ---------- */

.page-faq .faq-shell {
  display: grid;
  gap: 34px;
  padding-block: clamp(30px, 5vw, 56px) clamp(52px, 7vw, 92px);
}

.page-faq .faq-index,
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-index {
  border-top: var(--line-w) solid var(--c-orange);
  padding-top: 14px;
}

.page-faq .faq-index__label {
  margin: 0 0 16px;
  font-size: var(--step-note);
  letter-spacing: 0.18em;
  color: var(--c-mid);
  text-transform: uppercase;
}

.page-faq .faq-index__group + .faq-index__group {
  margin-top: 18px;
}

.page-faq .faq-index__head {
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--c-bone);
}

.page-faq .faq-index__head .phx-data {
  color: var(--c-orange);
  font-size: 14px;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 6px 8px 6px 10px;
  border-left: 2px solid var(--c-line);
  color: var(--c-ink);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.45;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-index__no {
  flex: none;
  color: var(--c-mid);
  font-size: 11px;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--c-orange);
  background: var(--c-surface);
  color: var(--c-bone);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

/* ---------- 章节 ---------- */

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px 18px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: var(--line-w) solid var(--c-line);
  margin-bottom: 4px;
}

.page-faq .faq-group__num {
  font-family: var(--f-data);
  font-size: clamp(38px, 5vw, 62px);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--c-orange);
  transition: color 300ms var(--ease);
}

.page-faq .faq-group.is-active .faq-group__num {
  color: var(--c-ember);
}

.page-faq .faq-group__title {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--step-section);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--c-bone);
}

.page-faq .faq-group__kicker {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--c-mid);
  max-width: 44em;
}

.page-faq .faq-group__lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: var(--step-body);
  line-height: 1.72;
  color: var(--c-ink);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-item {
  border-top: var(--line-w) solid var(--c-line);
  scroll-margin-top: calc(var(--bar-h) + 28px);
  transition: border-color 200ms var(--ease);
}

.page-faq .faq-item__q {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 14px;
  gap: 12px;
  align-items: start;
  padding: 16px 0;
  color: var(--c-bone);
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.55;
  transition: color 180ms var(--ease);
}

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

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__no {
  padding-top: 4px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-mid);
}

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

.page-faq .faq-item__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--c-orange);
}

.page-faq .faq-item__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
  transition: transform 200ms var(--ease);
}

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

.page-faq .faq-item__a {
  padding: 2px 0 22px;
  animation: faq-open 200ms var(--ease) both;
}

.page-faq .faq-item:target {
  border-top-color: var(--c-orange);
}

.page-faq .faq-item:target .faq-item__q {
  color: var(--c-orange);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-item__a p {
  margin: 0 0 0.9em;
  max-width: 40em;
  font-family: var(--f-body);
  font-size: var(--step-body);
  line-height: 1.72;
  color: var(--c-ink);
}

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

/* ---------- 内嵌示意图与迷你表格 ---------- */

.page-faq .faq-spark {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
  margin: 6px 0 4px;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
}

.page-faq .faq-mini-wrap {
  margin: 8px 0 4px;
  overflow-x: auto;
  border: var(--line-w) solid var(--c-line);
  background: var(--c-panel);
}

.page-faq .faq-mini {
  width: 100%;
  min-width: 360px;
  border-collapse: collapse;
  font-size: 13.5px;
}

.page-faq .faq-mini caption {
  padding: 10px 12px 8px;
  text-align: left;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--c-mid);
}

.page-faq .faq-mini th,
.page-faq .faq-mini td {
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-mini th {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-mid);
  white-space: nowrap;
}

.page-faq .faq-mini td {
  color: var(--c-bone);
}

.page-faq .faq-mini .phx-data {
  color: var(--c-cyan);
}

/* ---------- 客服卡片 ---------- */

.page-faq .faq-contact {
  margin-top: 30px;
  padding: 20px 20px 22px;
  background: var(--c-panel);
  border: var(--line-w) solid var(--c-line);
  border-left: 6px solid var(--c-orange);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--step-sub);
  letter-spacing: -0.01em;
  color: var(--c-bone);
}

.page-faq .faq-contact__list {
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 12px;
  background: var(--c-panel);
}

.page-faq .faq-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-mid);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--c-bone);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__row dd.phx-data {
  color: var(--c-cyan);
}

.page-faq .faq-contact__note {
  margin: 0 0 10px;
  max-width: 40em;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-faq .faq-contact__links {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-mid);
}

.page-faq .faq-contact__links a {
  color: var(--c-bone);
  text-decoration: underline;
  text-decoration-color: var(--c-orange);
  text-underline-offset: 3px;
}

.page-faq .faq-contact__links a:hover,
.page-faq .faq-contact__links a:focus-visible {
  color: var(--c-orange);
}

.page-faq .faq-contact__links a:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

/* ---------- 桌面双栏 ---------- */

@media (min-width: 1000px) {
  .page-faq .faq-hero {
    grid-template-columns: 56fr 44fr;
    gap: 40px;
    align-items: end;
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
    max-height: calc(100vh - var(--faq-sticky) - 28px);
    overflow-y: auto;
    padding-right: 4px;
  }

  .page-faq .faq-item__a {
    padding-left: 56px;
  }

  .page-faq .faq-figure--square {
    max-width: 340px;
  }
}

@media (min-width: 720px) and (max-width: 999px) {
  .page-faq .faq-item__a {
    padding-left: 56px;
  }

  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr);
    max-width: 720px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-item__q {
    grid-template-columns: 38px minmax(0, 1fr) 12px;
    gap: 10px;
  }

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

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

  .page-faq .faq-item__mark::after,
  .page-faq .faq-group__num,
  .page-faq .faq-index__link {
    transition: none;
  }
}