.page-faq {
  --faq-rail-w: 208px;
  --faq-hair: 1px solid var(--line);
  background:
    radial-gradient(92% 42% at 84% -4%, rgba(0, 229, 255, .12), transparent 62%),
    radial-gradient(58% 26% at -6% 14%, rgba(255, 92, 26, .07), transparent 72%),
    var(--ink-800);
  padding-bottom: clamp(64px, 12vw, 120px);
}

.page-faq .crumbs {
  padding-top: clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(34px, 7vw, 84px) 0 clamp(22px, 4vw, 38px);
  border-bottom: var(--faq-hair);
  overflow: hidden;
}

.page-faq .faq-hero .eyebrow {
  display: block;
  margin-bottom: 16px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(38px, 10vw, 92px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--paper);
  transform: skewX(-4deg);
  transform-origin: left bottom;
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  color: var(--cy);
  text-shadow: 0 0 26px rgba(0, 229, 255, .35);
}

.page-faq .faq-hero .lede {
  max-width: 34em;
  margin: clamp(18px, 3vw, 28px) 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-meta {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 0;
  border-top: var(--faq-hair);
  padding-top: 18px;
}

.page-faq .faq-meta li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 160px;
  padding-right: 18px;
  border-right: 1px solid var(--line);
}

.page-faq .faq-meta li:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-faq .faq-meta .data-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 20px;
  color: var(--cy);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-meta__cap {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体：侧边索引 + 问答 ---------- */
.page-faq .faq-shell {
  padding-top: clamp(26px, 5vw, 48px);
}

.page-faq .faq-rail {
  margin-bottom: clamp(26px, 5vw, 40px);
}

.page-faq .faq-rail__label {
  display: block;
  margin-bottom: 12px;
}

.page-faq .faq-chapter-nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  border-bottom: var(--faq-hair);
  padding-bottom: 6px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-chapter-nav::-webkit-scrollbar {
  display: none;
}

.page-faq .chapter-index__link {
  flex: 0 0 auto;
  display: inline-block;
  padding: 8px 14px 8px 0;
  font-size: 14px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .chapter-index__link:hover,
.page-faq .chapter-index__link[data-current] {
  color: var(--cy);
  border-bottom-color: var(--cy);
}

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

.page-faq .faq-search .search-field__input {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  background: var(--ink-700);
  border: 1px solid var(--line-strong);
  border-radius: 0;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 15px;
}

.page-faq .faq-search .search-field__input::placeholder {
  color: var(--mist);
}

.page-faq .faq-search .search-field__input:focus {
  outline: 2px solid var(--cy);
  outline-offset: 2px;
  border-color: var(--cy);
}

.page-faq .faq-search .search-empty {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-search .search-empty a {
  color: var(--cy);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  border-top: var(--faq-hair);
  padding: clamp(26px, 5vw, 44px) 0;
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq .section-num {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--cy);
}

.page-faq .section-title {
  margin: 0;
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-lede {
  max-width: 38ch;
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-subhead {
  margin: clamp(22px, 4vw, 32px) 0 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  padding-left: 12px;
  border-left: 3px solid var(--flame);
}

/* ---------- 可展开问答 ---------- */
.page-faq .fold {
  position: relative;
  border-bottom: var(--faq-hair);
}

.page-faq .fold > summary.fold__summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 42px 16px 16px;
  transition: color .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .fold > summary.fold__summary::-webkit-details-marker {
  display: none;
}

.page-faq .fold > summary.fold__summary::marker {
  content: "";
}

.page-faq .fold__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .fold > summary.fold__summary::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 15px;
  font-family: var(--font-data);
  font-size: 22px;
  line-height: 1;
  color: var(--cy);
}

.page-faq .fold[open] > summary.fold__summary::after {
  content: "\2013";
}

.page-faq .fold > summary.fold__summary:hover .fold__title {
  color: var(--cy-soft);
}

.page-faq .fold[open] {
  background: linear-gradient(90deg, rgba(0, 229, 255, .05), transparent 62%);
}

.page-faq .fold[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--cy);
  animation: faq-signal 1.8s var(--ease) infinite;
}

.page-faq .fold[open] .fold__title {
  color: var(--cy-soft);
}

.page-faq .fold__body {
  padding: 0 16px 22px 16px;
}

.page-faq .fold__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

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

@keyframes faq-signal {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}

/* ---------- 步骤编号 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .step-list li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .step-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.5;
  color: var(--cy);
  font-variant-numeric: tabular-nums;
}

.page-faq .step-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .faq-outcome {
  margin: 16px 0 0;
  padding: 10px 0 0 14px;
  border-left: 2px solid var(--flame);
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .faq-outcome b {
  color: var(--flame);
  font-weight: 700;
}

/* ---------- 图 ---------- */
.page-faq .faq-media-row {
  display: grid;
  gap: clamp(24px, 4vw, 36px);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-figure .media {
  overflow: hidden;
}

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

.page-faq .faq-figure--portrait .media {
  max-width: 300px;
}

.page-faq .faq-figure--wide {
  margin-top: clamp(24px, 4vw, 36px);
}

.page-faq .faq-figure--wide .media {
  max-width: 560px;
}

/* ---------- 客服渠道 ---------- */
.page-faq .faq-channel {
  display: grid;
  gap: 22px;
}

.page-faq .faq-channel__item {
  border-top: 2px solid var(--line-strong);
  padding-top: 16px;
}

.page-faq .faq-channel__label {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cy);
}

.page-faq .faq-channel__value {
  margin: 8px 0 6px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(18px, 4.6vw, 22px);
  color: var(--white);
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-channel__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.page-faq .copy-status {
  font-size: 13px;
  line-height: 1.6;
  color: var(--cy);
  min-height: 18px;
}

/* ---------- 清单 ---------- */
.page-faq .faq-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 2px;
  background: var(--cy);
}

/* ---------- 延伸链接 ---------- */
.page-faq .faq-more {
  margin-top: clamp(32px, 6vw, 56px);
  padding-top: 22px;
  border-top: var(--faq-hair);
}

.page-faq .faq-more .eyebrow {
  display: block;
  margin-bottom: 14px;
}

.page-faq .faq-more__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.page-faq .faq-more__list a {
  font-size: 14px;
  line-height: 1.6;
  color: var(--cy);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
  padding-bottom: 2px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-more__list a:hover {
  color: var(--cy-soft);
  border-bottom-color: var(--cy-soft);
}

/* ---------- 平板 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-meta li {
    flex: 1 1 0;
  }

  .page-faq .faq-channel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

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

/* ---------- 桌面：固定侧边索引 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
  }

  .page-faq .faq-chapter-nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-bottom: 0;
    border-left: var(--faq-hair);
    padding-bottom: 0;
  }

  .page-faq .chapter-index__link {
    display: block;
    padding: 12px 0 12px 16px;
    margin-left: -1px;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

  .page-faq .chapter-index__link:hover,
  .page-faq .chapter-index__link[data-current] {
    border-bottom-color: transparent;
    border-left-color: var(--cy);
  }

  .page-faq .faq-group:first-child {
    padding-top: 0;
  }

  .page-faq .faq-figure--wide .media {
    max-width: 620px;
  }
}

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

  .page-faq .chapter-index__link,
  .page-faq .faq-more__list a,
  .page-faq .fold > summary.fold__summary {
    transition: none;
  }
}