.page-faq {
  --faq-gap: clamp(1rem, 2.5vw, 1.75rem);
  display: block;
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(1.75rem, 5vw, 3.25rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -20%;
  right: -36%;
  width: min(130vw, 940px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.34) 0%, rgba(47, 224, 192, 0.15) 48%, rgba(5, 11, 31, 0) 74%);
  -webkit-clip-path: polygon(6% 18%, 100% 0, 88% 92%, 0 100%);
  clip-path: polygon(6% 18%, 100% 0, 88% 92%, 0 100%);
  transform: rotate(-8deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-hero h1 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6.4vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__deck {
  margin: 1.1rem 0 0;
  max-width: 34rem;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--orbit);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
}

.page-faq .faq-hero__meta .mono-tag {
  border-color: var(--ink-edge);
  color: var(--stardust);
}

.page-faq .faq-hero .btn-row {
  margin-top: 1.5rem;
}

.page-faq .faq-hero__figure {
  margin: 0;
  width: 100%;
}

/* ============ 索引面板 ============ */
.page-faq .faq-index__lead {
  max-width: 40rem;
  margin: 0.85rem 0 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--orbit);
}

.page-faq .faq-index__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-faq .faq-cat {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "count name"
    "desc desc";
  gap: 0.4rem 0.75rem;
  align-items: baseline;
  padding: 1.15rem 1.05rem 1.25rem;
  background: var(--ink-panel);
  border: 2px solid var(--ink-edge);
  color: var(--stardust);
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-cat::before {
  content: "";
  position: absolute;
  inset: -2px -2px auto -2px;
  height: 4px;
  background: var(--faq-c);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 rgba(34, 48, 92, 0.85);
  border-color: var(--gold);
  outline: none;
}

.page-faq .faq-cat:hover::before,
.page-faq .faq-cat:focus-visible::before {
  background: var(--gold);
}

.page-faq .faq-cat--coral { --faq-c: var(--coral); }
.page-faq .faq-cat--nebula { --faq-c: var(--nebula); }
.page-faq .faq-cat--pulse { --faq-c: var(--pulse); }
.page-faq .faq-cat--gold { --faq-c: var(--gold); }

.page-faq .faq-cat__count {
  grid-area: count;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--faq-c);
}

.page-faq .faq-cat__name {
  grid-area: name;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-cat__desc {
  grid-area: desc;
  margin-top: 0.35rem;
  font-size: 0.875rem;
  line-height: 1.68;
  color: var(--orbit);
}

.page-faq .faq-index__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding-top: 1rem;
  border-top: 2px solid var(--ink-edge);
  color: var(--orbit);
}

/* ============ 问答分组 ============ */
.page-faq .faq-group {
  --faq-c: var(--coral);
  position: relative;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.1rem, 3vw, 1.9rem);
  background: var(--ink-panel);
  border: 2px solid var(--ink-edge);
  border-left: 6px solid var(--faq-c);
}

.page-faq .faq-group--coral { --faq-c: var(--coral); }
.page-faq .faq-group--nebula { --faq-c: var(--nebula); }
.page-faq .faq-group--pulse { --faq-c: var(--pulse); }
.page-faq .faq-group--gold { --faq-c: var(--gold); }

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
  padding-bottom: 0.9rem;
  border-bottom: 2px solid var(--ink-edge);
  margin-bottom: 1rem;
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.4vw, 1.8rem);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__count {
  flex: 0 0 auto;
  padding: 0.22rem 0.6rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--faq-c);
  border: 2px solid currentColor;
  white-space: nowrap;
}

/* ============ 手风琴 ============ */
.page-faq .accordion {
  display: block;
}

.page-faq .accordion__item {
  margin-top: 0.75rem;
  background: var(--ink-void);
  border: 2px solid var(--ink-edge);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq .accordion__item.is-open {
  border-color: var(--faq-c);
  box-shadow: 6px 6px 0 rgba(34, 48, 92, 0.7);
}

.page-faq .accordion__heading {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  width: 100%;
  padding: 0.95rem 1rem;
  background: transparent;
  border: 0;
  color: var(--stardust);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.62;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .accordion__trigger:hover {
  background: rgba(124, 92, 255, 0.09);
}

.page-faq .accordion__trigger[aria-expanded="true"] {
  color: var(--white);
}

.page-faq .faq-q__no {
  flex: 0 0 auto;
  padding-top: 0.24rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--faq-c);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 0.5rem;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--faq-c);
  transition: transform 0.28s var(--ease);
}

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

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

.page-faq .accordion__item.is-open .accordion__icon::after,
.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: scaleY(0);
}

.page-faq .accordion__panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.38s var(--ease);
}

.page-faq .accordion__item.is-open > .accordion__panel {
  max-height: 80rem;
}

.page-faq .accordion__heading:has(.accordion__trigger[aria-expanded="true"]) + .accordion__panel {
  max-height: 80rem;
}

.page-faq .accordion__inner {
  padding: 0.35rem 1rem 1.2rem;
  border-top: 2px solid var(--ink-edge);
  color: var(--stardust);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .faq-steps {
  counter-reset: faq-step;
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-faq .faq-steps > li {
  counter-increment: faq-step;
  position: relative;
  padding-left: 2.15rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--stardust);
}

.page-faq .faq-steps > li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.28rem;
  padding: 0.14rem 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--faq-c);
  border: 1px solid var(--ink-edge);
}

.page-faq .faq-more {
  display: inline-block;
  margin-top: 0.95rem;
  padding-bottom: 0.12rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
}

.page-faq .faq-more:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ============ 自检清单 ============ */
.page-faq .faq-check__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: start;
  margin-top: 1.5rem;
}

.page-faq .faq-check__steps {
  counter-reset: faq-check;
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .faq-check__step {
  counter-increment: faq-check;
  position: relative;
  padding: 1rem 1.1rem 1.15rem 3.6rem;
  background: var(--ink-void);
  border: 2px solid var(--ink-edge);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-check__step::before {
  content: counter(faq-check, decimal-leading-zero);
  position: absolute;
  left: 1.05rem;
  top: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-faq .faq-check__step::after {
  content: "";
  position: absolute;
  left: 1.4rem;
  bottom: -1rem;
  width: 2px;
  height: 1rem;
  background: var(--ink-edge);
}

.page-faq .faq-check__step:last-child::after {
  display: none;
}

.page-faq .faq-check__step:hover {
  border-color: var(--pulse);
  transform: translateX(3px);
}

.page-faq .faq-check__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-check__step p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--orbit);
}

.page-faq .faq-check__figure {
  margin: 0;
  width: 100%;
}

/* ============ 求助区 ============ */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: 1.5rem;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-help__item {
  display: grid;
  gap: 0.25rem;
  padding: 0.9rem 1rem;
  background: var(--ink-void);
  border: 2px solid var(--ink-edge);
}

.page-faq .faq-help__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-help__value {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__aside {
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background: linear-gradient(150deg, rgba(124, 92, 255, 0.22), rgba(12, 21, 51, 0.9) 62%);
  border: 2px solid var(--ink-edge);
  border-top: 4px solid var(--nebula);
}

.page-faq .faq-help__aside-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help__aside p {
  margin: 0.75rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--stardust);
}

.page-faq .faq-help__aside .btn-row {
  margin-top: 1.25rem;
}

/* ============ 回到索引 ============ */
.page-faq .faq-top {
  display: flex;
  justify-content: center;
  margin-top: clamp(2.25rem, 6vw, 4rem);
}

.page-faq .faq-top__link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--stardust);
  text-decoration: none;
  background: var(--ink-panel);
  border: 2px solid var(--ink-edge);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-top__link::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 7px solid currentColor;
}

.page-faq .faq-top__link:hover,
.page-faq .faq-top__link:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
  transform: translateY(-3px);
  outline: none;
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-faq .faq-check__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .accordion__item,
  .page-faq .accordion__trigger,
  .page-faq .accordion__panel,
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .faq-check__step,
  .page-faq .faq-top__link {
    transition: none;
  }
}