/* ===== 帮助中心 /help/ ===== */
.page-faq {
  --faq-gutter-x: clamp(16px, 2.2vw, 24px);
  --faq-idx-w: 30px;
  --faq-rule: 1px solid var(--line);
  --faq-anchor: 96px;
  padding-bottom: clamp(60px, 8vw, 120px);
}

/* ---------- 页头 ---------- */
.page-faq .faq-intro {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(34px, 5vw, 58px);
  overflow: hidden;
}

.page-faq .faq-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(44, 58, 99, 0.34) 1px, transparent 1px),
    linear-gradient(rgba(44, 58, 99, 0.24) 1px, transparent 1px);
  background-size: 84px 84px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 84%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 84%);
  pointer-events: none;
}

.page-faq .faq-intro > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-intro__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-intro__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 52px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-faq .faq-intro__title {
    background-image: linear-gradient(100deg, var(--text) 34%, var(--cyan) 74%, var(--purple) 104%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-stat__label {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-intro__media {
  margin: 0;
  border: 1px solid var(--line);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  padding: clamp(30px, 4.4vw, 52px) 0 clamp(6px, 1.4vw, 14px);
}

.page-faq .faq-index__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 18px;
}

.page-faq .faq-index__label {
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-index__hint {
  font-size: 0.8rem;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(172px, 1fr));
  gap: 16px 18px;
  margin: 0;
  padding: 0 8px 8px 0;
  list-style: none;
}

.page-faq .faq-index__card {
  position: relative;
  z-index: 0;
  display: block;
  padding: 16px 18px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-faq .faq-index__card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-radius: 2px;
  transform: translate(6px, 6px);
  transition: transform 0.22s ease;
}

.page-faq .faq-index__card:hover,
.page-faq .faq-index__card:focus-visible {
  border-color: rgba(34, 230, 211, 0.55);
  background: var(--panel);
}

.page-faq .faq-index__card:hover::after,
.page-faq .faq-index__card:focus-visible::after {
  transform: translate(10px, 10px);
}

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

.page-faq .faq-index__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-index__title {
  display: block;
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-index__meta {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: var(--faq-anchor);
  padding: clamp(34px, 5vw, 60px) 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  align-items: start;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.8vw, 2.2rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: rgba(34, 230, 211, 0.38);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.65rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-group__media {
  margin: 0 0 clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--line);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
  max-width: 88ch;
}

.page-faq .faq-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 3px;
  background: var(--cyan);
  border-radius: 2px 0 0 2px;
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.24s ease;
}

.page-faq .faq-item[data-open="true"] {
  background: var(--surface);
  border-color: rgba(34, 230, 211, 0.45);
}

.page-faq .faq-item[data-open="true"]::before {
  transform: scaleY(1);
}

.page-faq .faq-item__heading {
  margin: 0;
  font-size: 1rem;
  font-weight: inherit;
}

.page-faq .faq-item__trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 16px var(--faq-gutter-x);
  background: none;
  border: 0;
  border-radius: 2px;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  min-width: var(--faq-idx-w);
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color 0.2s ease;
}

.page-faq .faq-item[data-open="true"] .faq-item__idx {
  color: var(--cyan);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-display);
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--text);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

.page-faq .faq-item[data-open="true"] .faq-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__panel {
  overflow: hidden;
}

.page-faq .faq-item[data-open="false"] .faq-item__panel {
  display: none;
}

.page-faq .faq-item__body {
  padding: 2px var(--faq-gutter-x) clamp(18px, 2vw, 24px)
           calc(var(--faq-gutter-x) + var(--faq-idx-w) + 14px);
}

.page-faq .faq-item__body > p {
  margin: 0 0 10px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-item__body > p.faq-item__lead {
  color: var(--text);
  font-weight: 500;
}

.page-faq .faq-item__body > *:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 230, 211, 0.4);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-steps {
  counter-reset: faq-step;
  display: grid;
  gap: 10px;
  margin: 12px 0 14px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps > li {
  position: relative;
  padding-left: 38px;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-steps > li::before {
  counter-increment: faq-step;
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 26px;
  padding: 2px 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-align: center;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 2px;
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-support {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.6vw, 42px);
  background: linear-gradient(140deg, var(--surface) 0%, var(--panel-deep) 100%);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-faq .faq-support::before {
  content: "";
  position: absolute;
  top: -42%;
  right: -12%;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(122, 92, 255, 0.3), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-support > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-support__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-faq .faq-support__text {
  max-width: 60ch;
  margin: 14px 0 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-support__list {
  display: grid;
  gap: 8px;
  max-width: 62ch;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-support__list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-support__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 26px;
}

.page-faq .faq-support__mail {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  word-break: break-all;
}

.page-faq .faq-support__links {
  margin: 24px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-support__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 230, 211, 0.4);
}

.page-faq .faq-support__links a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .page-faq {
    --faq-idx-w: 24px;
    --faq-gutter-x: 14px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: minmax(0, 1fr);
    column-gap: 0;
  }

  .page-faq .faq-group__num {
    grid-row: auto;
    font-size: 1.35rem;
    margin-bottom: 6px;
  }

  .page-faq .faq-group__note {
    grid-column: 1;
  }

  .page-faq .faq-item__body {
    padding-left: calc(var(--faq-gutter-x) + var(--faq-idx-w) + 12px);
  }

  .page-faq .faq-index__card::after {
    transform: translate(4px, 4px);
  }

  .page-faq .faq-index__card:hover::after,
  .page-faq .faq-index__card:focus-visible::after {
    transform: translate(6px, 6px);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-intro__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__card,
  .page-faq .faq-index__card::after,
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-item__idx,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}