.page-faq {
  --faq-gap: clamp(52px, 7.5vw, 104px);
  --faq-pad: clamp(18px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(36px, 5.5vw, 64px);
}

.page-faq .faq-hero.page-offset {
  padding-top: calc(var(--header-h) + clamp(40px, 7vw, 88px));
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  left: -12%;
  right: -12%;
  height: min(680px, 96vw);
  background:
    radial-gradient(56% 62% at 76% 20%, rgba(53, 240, 206, .15), transparent 68%),
    radial-gradient(46% 54% at 8% 4%, rgba(255, 138, 43, .10), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .crumbs {
  margin-bottom: clamp(22px, 3.6vw, 38px);
}

.page-faq .faq-hero__title {
  margin: .3em 0 0;
  font-size: clamp(34px, 8.2vw, 96px);
  line-height: .98;
  letter-spacing: -.02em;
  max-width: 15ch;
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  margin-top: clamp(20px, 3vw, 30px);
  color: var(--text);
  opacity: .88;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: clamp(30px, 5vw, 54px) 0 0;
  padding: 0;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-faq .faq-stat {
  background: var(--ink-2);
  padding: 16px 16px 20px;
  min-width: 0;
}

.page-faq .faq-stat dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-stat dd {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 页内跳转条 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: var(--header-h-scrolled);
  z-index: 4;
  background: rgba(5, 16, 13, .94);
  backdrop-filter: blur(8px);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-jump__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 9px 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-jump__link {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 13px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
  text-decoration: none;
  border: 2px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

.page-faq section[id] {
  scroll-margin-top: calc(var(--header-h-scrolled) + 96px);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-steps,
.page-faq .faq-update,
.page-faq .faq-archive,
.page-faq .faq-qa,
.page-faq .faq-fix,
.page-faq .faq-help {
  border-top: 2px solid var(--line);
}

.page-faq .faq-steps__lead,
.page-faq .faq-update__lead,
.page-faq .faq-archive__lead,
.page-faq .faq-qa__lead,
.page-faq .faq-fix__lead {
  max-width: 60ch;
  margin-top: clamp(16px, 2.4vw, 24px);
  color: var(--text);
  opacity: .85;
}

/* ---------- 01 三步 ---------- */
.page-faq .steplist {
  list-style: none;
  margin: clamp(28px, 4.5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .steplist__item {
  position: relative;
  min-width: 0;
  padding: var(--faq-pad);
  background: var(--surface);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .steplist__item:hover,
.page-faq .steplist__item:focus-within {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
}

.page-faq .steplist__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 46px;
  padding: 0 10px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.page-faq .steplist__title {
  margin: 18px 0 8px;
  font-size: clamp(19px, 2.1vw, 25px);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-faq .steplist__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .steplist__hint {
  margin: 14px 0 0;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--orange-soft);
  opacity: 1;
  transform: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}

.page-faq .faq-steps__tail {
  margin: clamp(26px, 4vw, 40px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

@media (min-width: 900px) {
  .page-faq .steplist {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    align-items: start;
  }

  .page-faq .steplist__item:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 44px;
    right: -26px;
    width: 26px;
    height: 2px;
    background: var(--cyan);
    opacity: .6;
  }

  .page-faq .steplist__hint {
    opacity: 0;
    transform: translateY(6px);
  }

  .page-faq .steplist__item:hover .steplist__hint,
  .page-faq .steplist__item:focus-within .steplist__hint {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 02 更新时间 ---------- */
.page-faq .faq-update__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(28px, 4.5vw, 48px);
}

.page-faq .timeline {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .timeline__row {
  padding: 20px 22px 22px;
  background: var(--ink-2);
  border-left: 3px solid var(--cyan-deep);
}

.page-faq .timeline__row--accent {
  border-left-color: var(--orange);
}

.page-faq .timeline__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .timeline__value {
  margin: 10px 0 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.15;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.page-faq .timeline__row--accent .timeline__value {
  color: var(--orange);
}

.page-faq .timeline__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-update__media {
  margin: 0;
  min-width: 0;
}

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

@media (min-width: 940px) {
  .page-faq .faq-update__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }
}

/* ---------- 03 旧版资料 ---------- */
.page-faq .faq-archive__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(28px, 4.5vw, 48px);
}

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

.page-faq .layers__level {
  border-left: 2px solid var(--line);
  padding-left: 16px;
}

.page-faq .layers__level--1 {
  border-left-color: var(--cyan);
}

.page-faq .layers__level--2 {
  margin: 16px 0 0 14px;
  border-left-color: var(--cyan-deep);
}

.page-faq .layers__level--3 {
  margin: 16px 0 0 14px;
  border-left-color: var(--orange);
}

.page-faq .layers__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .layers__level--3 .layers__tag {
  color: var(--orange-soft);
}

.page-faq .layers__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.page-faq .faq-archive__media {
  margin: 0;
  min-width: 0;
}

@media (min-width: 940px) {
  .page-faq .faq-archive__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 04 问答组 ---------- */
.page-faq .qa {
  display: grid;
  gap: 12px;
  margin-top: clamp(28px, 4.5vw, 46px);
}

.page-faq .qa .expand {
  border: 2px solid var(--line);
  background: var(--ink-2);
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}

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

.page-faq .qa .expand:has(.expand__panel[data-open]) {
  border-color: var(--orange);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-faq .qa .expand__trigger {
  cursor: pointer;
  font-family: inherit;
}

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

.page-faq .qa__q {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.005em;
}

.page-faq .qa .expand__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 68ch;
}

/* ---------- 05 处理顺序 ---------- */
.page-faq .checklist {
  list-style: none;
  margin: clamp(28px, 4.5vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-faq .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  align-items: start;
  padding: 22px 22px 24px;
  background: var(--ink-2);
}

.page-faq .checklist__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .checklist__item h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.4;
}

.page-faq .checklist__item p {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 06 联系卡 ---------- */
.page-faq .helpcard {
  display: grid;
  border: 2px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-faq .helpcard__body {
  padding: clamp(24px, 3.4vw, 42px);
  min-width: 0;
}

.page-faq .helpcard__lead {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .helpcard__list {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .helpcard__list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .helpcard__list li > span:last-child {
  overflow-wrap: anywhere;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-faq .helpcard__side {
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  padding: clamp(24px, 3.4vw, 42px);
  border-top: 2px solid var(--line);
  background: var(--surface);
}

.page-faq .helpcard__side .btn {
  text-align: center;
}

@media (min-width: 880px) {
  .page-faq .helpcard {
    grid-template-columns: minmax(0, 1fr) 288px;
  }

  .page-faq .helpcard__side {
    border-top: 0;
    border-left: 2px solid var(--line);
  }
}

@media (max-width: 520px) {
  .page-faq .faq-stat {
    padding: 14px 13px 17px;
  }

  .page-faq .helpcard__list li {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .checklist__item {
    padding: 18px 16px 20px;
    gap: 4px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .steplist__item,
  .page-faq .steplist__hint,
  .page-faq .qa .expand,
  .page-faq .faq-jump__link {
    transition: none;
  }
}