.page-faq {
  --faq-gap: clamp(1rem, 2.6vw, 2rem);
  --faq-rail: 104px;
}

/* ---------- 首屏 ---------- */
.page-faq__hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(2.25rem, 6vw, 4.5rem) clamp(2.5rem, 6vw, 4.75rem);
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(255, 107, 44, 0.22), transparent 44%),
    linear-gradient(300deg, rgba(45, 212, 255, 0.16), transparent 58%);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -34%;
  width: 58%;
  height: 168%;
  background: linear-gradient(135deg, rgba(255, 107, 44, 0.2), rgba(45, 212, 255, 0.1) 58%, transparent);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-faq__hero .container {
  position: relative;
  z-index: 1;
}

.page-faq__hero .breadcrumbs {
  color: rgba(244, 239, 227, 0.62);
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-faq__hero .breadcrumbs a {
  color: var(--orange-soft);
}

.page-faq__hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-faq__hero .h-display {
  color: var(--paper-2);
  margin: 0.4rem 0 0;
  letter-spacing: -0.02em;
  max-width: 15em;
}

.page-faq__hero .lede {
  color: rgba(244, 239, 227, 0.78);
  margin-top: 1.15rem;
  max-width: 38em;
}

.page-faq__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 2rem;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 1.1rem 0 0;
  list-style: none;
  border-top: 1px solid rgba(251, 248, 240, 0.16);
}

.page-faq__facts li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(244, 239, 227, 0.68);
}

.page-faq__facts .mono {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.04em;
}

.page-faq__hero-media {
  width: 100%;
}

/* ---------- 筛选条 ---------- */
.page-faq__filterbar {
  background: var(--paper-2);
  border-block: 1px solid var(--line-light);
}

.page-faq__filter-row {
  display: grid;
  gap: 0.85rem;
}

.page-faq__filter {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--line-light);
  border-radius: var(--r-md);
  background: var(--paper);
  padding: 0.6rem 0.9rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq__filter:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(45, 212, 255, 0.25);
}

.page-faq__filter-label {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--link);
  flex: none;
}

.page-faq__filter-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 1rem;
  color: var(--slate);
  outline: none;
}

.page-faq__filter-input::placeholder {
  color: rgba(27, 42, 51, 0.42);
  font-family: var(--f-mono);
  font-size: 0.875rem;
}

.page-faq__filter-hint {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(27, 42, 51, 0.66);
}

.page-faq__filter-hint a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.15rem;
}

.page-faq__chip {
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  padding: 0.36rem 0.78rem;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  color: var(--slate);
  background: var(--paper);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq__chip:hover,
.page-faq__chip:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 107, 44, 0.12);
  color: var(--ink);
}

/* ---------- 分组骨架 ---------- */
.page-faq__group {
  scroll-margin-top: 4.5rem;
}

.page-faq__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq__index {
  display: block;
  font-family: var(--f-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-faq__aside-label {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: rgba(27, 42, 51, 0.5);
}

.page-faq__module {
  min-width: 0;
}

.page-faq__module .h2 {
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}

.page-faq__note {
  margin: 0 0 1.4rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(27, 42, 51, 0.68);
  max-width: 44em;
}

/* ---------- 折叠问答 ---------- */
.page-faq__list {
  border-top: 1px solid var(--line-light);
}

.page-faq__list .expand {
  border-bottom: 1px solid var(--line-light);
}

.page-faq__q {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  text-align: left;
}

.page-faq__item[data-open="true"] .page-faq__q {
  color: var(--link);
}

.page-faq__item .expand__panel p {
  margin: 0 0 0.55rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(27, 42, 51, 0.82);
}

.page-faq__item .expand__panel p:last-child {
  margin-bottom: 0;
}

.page-faq__tip {
  border-left: 3px solid var(--orange);
  padding: 0.35rem 0 0.35rem 0.85rem;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 步骤组 ---------- */
.page-faq__steps {
  display: grid;
  gap: 0.7rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq__step {
  position: relative;
  display: block;
  padding: 0.9rem 1rem;
  background: var(--paper-2);
  border: 1px solid var(--line-light);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-1);
}

.page-faq__step-n {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--blue);
  margin-bottom: 0.35rem;
}

.page-faq__step-t {
  display: block;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-faq__figure {
  width: 100%;
  margin: 0 0 1.5rem;
}

.page-faq__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq__more {
  margin: 1.35rem 0 0;
  font-size: 0.9rem;
  color: rgba(27, 42, 51, 0.72);
}

.page-faq__more a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 深色分组（平板） ---------- */
.page-faq__band {
  background: var(--ink-2);
  color: var(--paper);
}

.page-faq__band .h2 {
  color: var(--paper-2);
}

.page-faq__band .page-faq__index {
  color: var(--blue);
}

.page-faq__band .page-faq__aside-label {
  color: rgba(244, 239, 227, 0.55);
}

.page-faq__band .page-faq__note {
  color: rgba(244, 239, 227, 0.7);
}

.page-faq__band .page-faq__list {
  border-top-color: rgba(251, 248, 240, 0.16);
}

.page-faq__band .page-faq__list .expand {
  border-bottom-color: rgba(251, 248, 240, 0.16);
}

.page-faq__band .page-faq__q {
  color: var(--paper);
}

.page-faq__band .page-faq__item[data-open="true"] .page-faq__q {
  color: var(--orange-soft);
}

.page-faq__band .page-faq__item .expand__panel p {
  color: rgba(244, 239, 227, 0.82);
}

/* ---------- 收尾 ---------- */
.page-faq__cta {
  border-top: 1px solid var(--line-light);
  background: var(--paper-2);
}

.page-faq__cta .h2 {
  margin-bottom: 0.75rem;
}

.page-faq__cta .page-faq__module > p {
  margin: 0 0 1.4rem;
  max-width: 46em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(27, 42, 51, 0.76);
}

.page-faq__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
  }

  .page-faq__filter-row {
    grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq__filter-hint {
    text-align: right;
  }
}

@media (min-width: 880px) {
  .page-faq__row {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.75rem);
  }

  .page-faq__aside {
    position: sticky;
    top: 2.5rem;
  }

  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq__hero-media {
    justify-self: end;
  }
}

@media (min-width: 1100px) {
  .page-faq__row {
    --faq-rail: 132px;
  }

  .page-faq__module .h2 {
    font-size: clamp(1.5rem, 2.1vw, 1.85rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__filter,
  .page-faq__chip {
    transition: none;
  }
}