/* ============================================================
   帮助中心 /help/ —— 页面作用域 .page-faq
   ============================================================ */

.page-faq {
  --faq-amber-ink: #99500F;
  --faq-hairline: rgba(10, 13, 12, .16);
  background: var(--bg-deep);
  color: var(--paper);
  font-family: var(--font-sans);
}

/* ---------- 面包屑 ---------- */

.page-faq .faq-crumbs {
  padding: 26px 0 6px;
}

.page-faq .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .crumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text-dim);
}

.page-faq .crumbs__link {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .crumbs__link:hover,
.page-faq .crumbs__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .crumbs__sep {
  color: var(--bg-line);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--bg-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -46%;
  right: -14%;
  width: 58%;
  height: 192%;
  background: linear-gradient(165deg, rgba(43, 240, 200, .14), rgba(43, 240, 200, 0) 62%);
  transform: rotate(13deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg,
      var(--cyan) 0%,
      var(--cyan) 20%,
      var(--orange) 20%,
      var(--orange) 26%,
      var(--bg-line) 26%,
      var(--bg-line) 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 28px;
  padding-bottom: 46px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 16px;
  max-width: 22ch;
  font-size: clamp(30px, 5.4vw, 58px);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--bg-line);
  border: 1px solid var(--bg-line);
  align-self: end;
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 14px;
  background: var(--bg-mid);
}

.page-faq .faq-stat__n {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-stat--hot .faq-stat__n {
  color: var(--orange);
}

.page-faq .faq-stat--sm .faq-stat__n {
  font-size: clamp(15px, 2.4vw, 19px);
  letter-spacing: 0;
}

.page-faq .faq-stat__l {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--text-dim);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding-top: 44px;
  padding-bottom: 72px;
}

/* 左栏索引 */

.page-faq .faq-side__label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-faq .faq-index {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 13px;
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--cyan-soft);
  text-decoration: none;
  background: var(--bg-mid);
  border: 1px solid var(--bg-line);
  border-left: 3px solid transparent;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--bg-line);
  border-left-color: var(--cyan);
  color: var(--paper);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 5px;
  color: var(--text-dim);
  border: 1px solid var(--bg-line);
}

.page-faq .faq-side__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-side__note a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-side__note a:hover {
  color: var(--cyan);
}

/* ---------- 分类区块 ---------- */

.page-faq .faq-cat {
  margin-bottom: 52px;
  min-width: 0;
}

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

.page-faq .faq-cat__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--bg-line);
}

.page-faq .faq-cat__num {
  flex: none;
  margin-top: 4px;
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--bg-deep);
  background: var(--cyan);
  font-variant-numeric: tabular-nums;
}

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

.page-faq .faq-cat__title {
  margin: 0;
  font-size: clamp(21px, 3vw, 29px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-cat__note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 两步流程 ---------- */

.page-faq .faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 22px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(18, 84, 69, .55), rgba(11, 56, 44, .92));
  border: 1px solid var(--bg-line);
}

.page-faq .faq-flow__figure {
  margin: 0;
  overflow: hidden;
  background: var(--bg-deep);
  border: 1px solid var(--bg-line);
}

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

.page-faq .faq-flow__steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: center;
}

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

.page-faq .faq-flow__step-num {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--bg-deep);
  background: var(--cyan);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 rgba(10, 13, 12, .5);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-flow__step-body {
  min-width: 0;
}

.page-faq .faq-flow__step-title {
  margin: 4px 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-flow__step-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 配图 ---------- */

.page-faq .faq-media {
  margin: 0 0 20px;
  overflow: hidden;
  background: var(--bg-mid);
  border: 1px solid var(--bg-line);
}

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

.page-faq .faq-media--square img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  display: block;
}

.page-faq .qa {
  margin-bottom: 10px;
  background: var(--bg-mid);
  border: 1px solid var(--bg-line);
  transition: background .18s var(--ease), border-color .18s var(--ease),
    transform .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--cyan);
}

.page-faq .qa > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px 16px;
  list-style: none;
  cursor: pointer;
  color: var(--paper);
  transition: color .18s var(--ease);
}

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

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__num {
  flex: none;
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
  background: rgba(43, 240, 200, .12);
  font-variant-numeric: tabular-nums;
  transition: color .18s var(--ease), background .18s var(--ease);
}

.page-faq .qa__text {
  min-width: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: .005em;
}

.page-faq .qa__plus {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .qa__plus::before,
.page-faq .qa__plus::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform .2s var(--ease), background .2s var(--ease);
}

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

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

.page-faq .qa[open] {
  background: var(--paper);
  border-color: var(--cyan);
  transform: translateY(-3px);
  box-shadow: 5px 5px 0 rgba(43, 240, 200, .32);
}

.page-faq .qa[open] > summary {
  color: var(--ink);
}

.page-faq .qa[open] .qa__num {
  color: var(--faq-amber-ink);
  background: rgba(255, 122, 47, .16);
}

.page-faq .qa[open] .qa__plus::before {
  background: var(--orange);
}

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

.page-faq .qa__a {
  padding: 14px 16px 20px;
  border-top: 1px dashed var(--faq-hairline);
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim-ink);
}

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

.page-faq .qa__a a {
  color: var(--bg-mid);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__a a:hover {
  color: var(--bg-line);
}

/* ---------- 人工支持（纸白分区） ---------- */

.page-faq .faq-help {
  background: var(--paper);
  color: var(--ink);
  border-top: 4px solid var(--cyan);
}

.page-faq .faq-help__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 50px;
  padding-bottom: 56px;
}

.page-faq .faq-help .eyebrow {
  color: var(--faq-amber-ink);
}

.page-faq .faq-help__title {
  margin: 10px 0 14px;
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .faq-help__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim-ink);
}

.page-faq .faq-help__text a {
  color: var(--bg-mid);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-help__channels {
  border-top: 1px solid var(--faq-hairline);
}

.page-faq .faq-channel {
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--faq-hairline);
}

.page-faq .faq-channel__label {
  margin: 0 0 7px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faq-amber-ink);
}

.page-faq .faq-channel__value {
  margin: 0 0 5px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-channel__value--sm {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .01em;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-faq .faq-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: 24px;
    padding: 20px;
  }

  .page-faq .faq-media--square {
    max-width: 280px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 62px;
    padding-bottom: 68px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.42fr) minmax(300px, .88fr);
    align-items: end;
    gap: 56px;
    padding-top: 44px;
    padding-bottom: 62px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    padding-top: 52px;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-index {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-top: 1px solid var(--bg-line);
  }

  .page-faq .faq-index__item {
    border-bottom: 1px solid var(--bg-line);
  }

  .page-faq .faq-index__link {
    width: 100%;
    padding: 13px 12px;
    background: transparent;
    border: 0;
    border-left: 3px solid transparent;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: var(--bg-mid);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-index__count {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__plus::before,
  .page-faq .qa__plus::after,
  .page-faq .qa__num,
  .page-faq .qa > summary,
  .page-faq .faq-index__link,
  .page-faq .crumbs__link {
    transition: none;
  }

  .page-faq .qa[open] {
    transform: none;
  }
}