.page-faq {
  --faq-rail-w: 250px;
  --faq-rule: rgba(15, 42, 68, .12);
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: 3.5rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--ivory);
  padding: 1.25rem 1.25rem 2.5rem;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(122, 219, 221, .10) 0 1px, transparent 1px 64px);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan) 0 33.3%, var(--orange) 33.3% 66.6%, var(--sand) 66.6% 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
}

.page-faq .breadcrumbs {
  margin-bottom: 1.5rem;
}

.page-faq .faq-hero .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
}

.page-faq .faq-hero .breadcrumbs__item {
  color: rgba(251, 247, 239, .62);
}

.page-faq .faq-hero .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: .4rem;
  color: rgba(251, 247, 239, .35);
}

.page-faq .faq-hero .breadcrumbs__item a {
  color: var(--cyan-soft);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumbs__item a:hover,
.page-faq .faq-hero .breadcrumbs__item a:focus-visible {
  text-decoration: underline;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 7vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ivory);
}

.page-faq .faq-hero__lede {
  margin: 1rem 0 0;
  max-width: 58ch;
  font-size: .95rem;
  line-height: 1.75;
  color: rgba(251, 247, 239, .82);
}

.page-faq .faq-search {
  margin-top: 1.5rem;
  max-width: 560px;
}

.page-faq .faq-search__input {
  width: 100%;
  box-sizing: border-box;
  padding: .85rem 1rem;
  border-radius: var(--r-sm);
  border: 1px solid rgba(251, 247, 239, .34);
  background: rgba(251, 247, 239, .10);
  color: var(--ivory);
  font-family: var(--font-body);
  font-size: .95rem;
  -webkit-appearance: none;
  appearance: none;
}

.page-faq .faq-search__input::placeholder {
  color: rgba(251, 247, 239, .58);
}

.page-faq .faq-search__input:focus {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  background: rgba(251, 247, 239, .16);
}

.page-faq .faq-search__status {
  margin: .6rem 0 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--cyan-soft);
}

/* ---------- 骨架 ---------- */
.page-faq .faq-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 0;
  display: grid;
  gap: 1.5rem;
}

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

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail {
  background: var(--sand);
  border-radius: var(--r-md);
  padding: 1rem 1rem 1.15rem;
  border-top: 3px solid var(--cyan);
}

.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: .85rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .2rem;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .5rem .45rem;
  border-radius: var(--r-xs);
  color: var(--ink);
  text-decoration: none;
  font-size: .85rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: rgba(255, 107, 53, .14);
  color: var(--ink-900);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--orange);
  letter-spacing: .02em;
}

.page-faq .faq-rail__tip {
  margin: 1rem 0 0;
  padding-top: .85rem;
  border-top: 1px dashed rgba(15, 42, 68, .22);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--ink-mid);
}

.page-faq .faq-rail__more {
  display: inline-block;
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .05em;
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-rail__more:hover,
.page-faq .faq-rail__more:focus-visible {
  color: var(--orange);
}

/* ---------- 筛选 ---------- */
.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin-bottom: 1.35rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-filters__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--stone);
}

.page-faq .faq-filters__count::after {
  content: " 条";
}

/* ---------- 问题块 ---------- */
.page-faq .faq-block {
  background: #fff;
  border: 1px solid var(--faq-rule);
  border-left: 4px solid var(--cyan);
  border-radius: var(--r-sm);
  padding: 1.15rem 1rem 1.25rem;
  scroll-margin-top: 1.5rem;
}

.page-faq .faq-block + .faq-block {
  margin-top: 1.35rem;
}

.page-faq .faq-block--check { border-left-color: var(--orange); }
.page-faq .faq-block--download { border-left-color: var(--moss); }
.page-faq .faq-block--member { border-left-color: var(--clay); }
.page-faq .faq-block--tech { border-left-color: var(--stone); }

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: .65rem;
  margin-bottom: .5rem;
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 4.6vw, 1.45rem);
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-block__lede {
  margin: 0 0 1rem;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  background: var(--ivory);
  border: 1px solid var(--faq-rule);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-faq .qa + .qa {
  margin-top: .6rem;
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .9rem .95rem;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  font-size: .92rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .qa__q::-webkit-details-marker { display: none; }
.page-faq .qa__q::marker { content: ""; }

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

.page-faq .qa__chev {
  flex: 0 0 auto;
  margin-top: .2rem;
  color: var(--cyan);
  transition: transform .2s ease;
}

.page-faq .qa[open] .qa__chev {
  transform: rotate(90deg);
  color: var(--orange);
}

.page-faq .qa[open] .qa__q {
  background: #fff;
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--ink-900);
  outline: none;
}

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

.page-faq .qa__a {
  padding: 0 .95rem 1rem;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .qa__a > p {
  margin: 0 0 .25rem;
}

.page-faq .qa__steps {
  list-style: none;
  counter-reset: faqstep;
  margin: .85rem 0 0;
  padding: 0;
}

.page-faq .qa__steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 1.85rem;
  margin-top: .5rem;
  font-size: .86rem;
  line-height: 1.7;
}

.page-faq .qa__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .16em;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--orange);
}

.page-faq .qa__hint {
  margin: .9rem 0 0;
  padding: .55rem .75rem;
  border-left: 2px solid var(--cyan);
  background: rgba(40, 194, 198, .09);
  font-size: .8rem;
  line-height: 1.65;
  color: var(--ink-mid);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 1.1rem 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-sm);
  border: 1px solid var(--faq-rule);
  object-fit: cover;
}

.page-faq .faq-figure--tall img {
  max-width: 300px;
}

.page-faq .faq-figure figcaption {
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .03em;
  color: var(--stone);
}

/* ---------- 联系收口 ---------- */
.page-faq .faq-contact {
  position: relative;
  overflow: hidden;
  margin-top: 1.75rem;
  padding: 1.5rem 1.1rem 1.6rem;
  border-radius: var(--r-md);
  background: var(--ink-900);
  color: var(--ivory);
  scroll-margin-top: 1.5rem;
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(40, 194, 198, .13) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

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

.page-faq .faq-contact__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 5vw, 1.6rem);
  letter-spacing: -.01em;
  color: var(--ivory);
}

.page-faq .faq-contact__lede {
  margin: .6rem 0 0;
  font-size: .86rem;
  line-height: 1.7;
  color: rgba(251, 247, 239, .78);
}

.page-faq .faq-contact__items {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-contact__items li {
  padding: .6rem .75rem;
  border-radius: var(--r-sm);
  background: rgba(251, 247, 239, .07);
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-contact__key {
  display: block;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-faq .faq-contact__val {
  display: block;
  margin-top: .25rem;
  font-family: var(--font-mono);
  font-size: .88rem;
  word-break: break-word;
  color: var(--ivory);
}

.page-faq .faq-contact__note {
  margin: 1rem 0 0;
  font-size: .8rem;
  line-height: 1.7;
  color: rgba(251, 247, 239, .72);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.15rem;
}

.page-faq .faq-contact__links {
  margin: 1.1rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(251, 247, 239, .16);
  font-size: .78rem;
  line-height: 1.8;
  color: rgba(251, 247, 239, .7);
}

.page-faq .faq-contact__links a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(122, 219, 221, .45);
}

.page-faq .faq-contact__links a:hover,
.page-faq .faq-contact__links a:focus-visible {
  color: var(--ivory);
  border-bottom-color: var(--orange);
}

.page-faq [hidden] {
  display: none !important;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 1.75rem 2rem 3.25rem;
  }

  .page-faq .faq-hero__lede {
    font-size: 1.02rem;
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 2.75rem;
    padding: 2.5rem 2rem 0;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 1.25rem;
    align-self: start;
    padding: 1.15rem 1.1rem 1.25rem;
  }

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

  .page-faq .faq-block {
    padding: 1.5rem 1.6rem 1.6rem;
  }

  .page-faq .faq-block + .faq-block {
    margin-top: 1.6rem;
  }

  .page-faq .qa__q {
    padding: 1rem 1.15rem;
    font-size: .96rem;
  }

  .page-faq .qa__a {
    padding: 0 1.15rem 1.15rem;
    font-size: .9rem;
  }

  .page-faq .faq-contact {
    padding: 2rem 1.75rem 2.1rem;
    margin-top: 2.25rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__chev {
    transition: none;
  }
}
</main>