/* ============ 帮助中心 page-faq ============ */

.page-faq {
  --faq-line: var(--grid);
  --faq-soft: rgba(53, 240, 180, 0.07);
  --faq-numcol: 62px;
  display: block;
  padding-bottom: clamp(44px, 6vw, 84px);
}

.page-faq .breadcrumb {
  margin-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-link {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 180, 0.38);
  transition: border-color var(--t-hover) var(--ease), color var(--t-hover) var(--ease);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  margin-top: clamp(26px, 4vw, 48px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8.6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__title-mark {
  color: var(--signal);
  display: inline-block;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--body-text);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-pod);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
  text-decoration: none;
  transition: color var(--t-hover) var(--ease), border-color var(--t-hover) var(--ease), transform var(--t-hover) var(--ease);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: 1px solid var(--faq-line);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(27, 135, 166, 0.28), rgba(90, 59, 133, 0.22) 58%, rgba(8, 14, 31, 0) 100%);
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  opacity: 0.9;
}

.page-faq .faq-hero__fig figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}

/* ---------- 三步引导 ---------- */

.page-faq .faq-steps {
  margin-top: clamp(48px, 7vw, 92px);
  padding-top: clamp(30px, 4vw, 50px);
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-faq .faq-steps__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .faq-steps__list {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: var(--faq-numcol) minmax(0, 1fr);
  column-gap: 14px;
  padding: 24px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-step:first-child {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--amber);
  text-align: center;
}

.page-faq .faq-step__num::after {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  margin: 9px auto 0;
  background: rgba(255, 139, 61, 0.55);
}

.page-faq .faq-step__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-step__text {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--body-text);
}

.page-faq .faq-step__where {
  display: inline-flex;
  align-items: center;
  margin-top: 13px;
  padding: 4px 12px;
  border: 1px solid rgba(27, 135, 166, 0.6);
  border-radius: var(--radius-pod);
  background: rgba(27, 135, 166, 0.1);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--paper);
}

.page-faq .faq-step__check {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
  cursor: pointer;
  width: fit-content;
}

.page-faq .faq-step__check input {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin: 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--faq-line);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
}

.page-faq .faq-step__check input:checked {
  border-color: var(--signal);
  background: var(--faq-soft);
}

.page-faq .faq-step__check input:checked::after {
  content: "✓";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 11px;
  line-height: 1;
  color: var(--signal);
}

.page-faq .faq-step__check input:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-groups {
  margin-top: clamp(48px, 7vw, 92px);
}

.page-faq .faq-group {
  padding-top: clamp(34px, 5vw, 60px);
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--mute);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__summary {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute);
}

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

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

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(15.5px, 1.8vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--t-hover) var(--ease);
}

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

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  content: "–";
  color: var(--signal);
}

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

.page-faq .faq-item__a {
  padding: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 68ch;
}

.page-faq .faq-loc {
  display: inline-block;
  padding: 2px 9px;
  margin: 0 1px;
  border: 1px solid rgba(53, 240, 180, 0.36);
  border-radius: 5px;
  background: var(--faq-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--signal);
}

/* ---------- 反馈与处理 ---------- */

.page-faq .faq-flow {
  margin-top: clamp(48px, 7vw, 92px);
  padding-top: clamp(30px, 4vw, 50px);
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-faq .faq-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(24px, 4vw, 40px);
}

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

.page-faq .faq-flow__item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  column-gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-flow__item:first-child {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-flow__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
  padding-top: 3px;
}

.page-faq .faq-flow__label {
  margin: 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-flow__desc {
  margin: 6px 0 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .faq-flow__note {
  margin: 22px 0 0;
  max-width: 62ch;
  padding-left: 16px;
  border-left: 2px solid var(--amber);
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-flow__fig {
  margin: 0;
  border: 1px solid var(--faq-line);
  overflow: hidden;
  background: linear-gradient(200deg, rgba(90, 59, 133, 0.26), rgba(27, 135, 166, 0.2) 58%, rgba(8, 14, 31, 0) 100%);
}

.page-faq .faq-flow__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  opacity: 0.9;
}

/* ---------- 人工帮助 ---------- */

.page-faq .faq-human {
  margin-top: clamp(48px, 7vw, 92px);
  padding-top: clamp(30px, 4vw, 50px);
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-faq .faq-human__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .faq-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(34px, 5vw, 58px);
}

.page-faq .faq-channel {
  padding-top: 22px;
  border-top: 2px solid var(--faq-line);
  transition: transform var(--t-hover) var(--ease), border-color var(--t-hover) var(--ease);
}

.page-faq .faq-channel:hover,
.page-faq .faq-channel:focus-within {
  transform: translateY(-4px);
  border-top-color: var(--cyan);
}

.page-faq .faq-channel__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--faq-line);
  border-radius: 10px;
  background: rgba(233, 239, 248, 0.03);
  transition: transform var(--t-hover) var(--ease), border-color var(--t-hover) var(--ease);
}

.page-faq .faq-channel:hover .faq-channel__icon {
  transform: scale(1.14);
  border-color: rgba(233, 239, 248, 0.22);
}

.page-faq .faq-channel__icon svg {
  display: block;
  width: 20px;
  height: 20px;
}

.page-faq .faq-channel--signal .faq-channel__icon svg { color: var(--signal); }
.page-faq .faq-channel--cyan .faq-channel__icon svg { color: #4FC3E0; }
.page-faq .faq-channel--amber .faq-channel__icon svg { color: var(--amber); }

.page-faq .faq-channel__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-channel__use {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-channel__act {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--signal);
  word-break: break-word;
}

.page-faq .faq-channel--amber .faq-channel__act {
  color: var(--amber);
}

.page-faq .faq-footnote {
  margin: clamp(30px, 4vw, 48px) 0 0;
  max-width: 70ch;
  padding-top: 20px;
  border-top: 1px solid var(--faq-line);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq {
    --faq-numcol: 96px;
  }

  .page-faq .faq-step {
    column-gap: 28px;
    padding: 32px 0;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-group__head {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: clamp(28px, 4vw, 56px);
    align-items: baseline;
  }

  .page-faq .faq-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(36px, 5vw, 72px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-flow__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__link,
  .page-faq .faq-item__q,
  .page-faq .faq-channel,
  .page-faq .faq-channel__icon {
    transition: none;
  }

  .page-faq .faq-jump__link:hover,
  .page-faq .faq-channel:hover {
    transform: none;
  }

  .page-faq .faq-channel:hover .faq-channel__icon {
    transform: none;
  }
}