.page-faq {
  --faq-pad: clamp(18px, 5vw, 56px);
  --faq-gap: clamp(18px, 3.4vw, 40px);
  --faq-radius: 22px 6px 22px 6px;
  --faq-line: rgba(58, 77, 89, .5);
  --faq-accent: var(--bw-mute);
  background: var(--bw-night);
  color: var(--bw-paper);
  overflow-x: clip;
}

.page-faq .faq-inner {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--faq-pad);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(34px, 6vw, 92px) clamp(38px, 6vw, 80px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__visual {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.page-faq .faq-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  filter: saturate(.65) contrast(1.05);
}

.page-faq .faq-hero__wash {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 85% at 14% 0%, rgba(53, 201, 193, .2), transparent 62%),
    radial-gradient(90% 70% at 92% 12%, rgba(227, 167, 60, .12), transparent 60%),
    linear-gradient(180deg, rgba(10, 22, 34, .3) 0%, rgba(10, 22, 34, .86) 68%, var(--bw-night) 100%);
}

.page-faq .faq-hero__kicker {
  margin-top: clamp(20px, 4vw, 40px);
  color: var(--bw-cyan);
  letter-spacing: .14em;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--bw-narrow);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 76px);
  line-height: 1.03;
  letter-spacing: -.02em;
  max-width: 15em;
  text-wrap: balance;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--bw-cyan);
}

.page-faq .faq-hero__lede {
  margin: clamp(18px, 3vw, 30px) 0 0;
  max-width: 38em;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.78;
  color: var(--bw-paper-soft);
}

.page-faq .faq-index {
  margin-top: clamp(30px, 5vw, 58px);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  overflow: hidden;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  gap: 4px 16px;
  height: 100%;
  padding: 18px 20px 21px;
  background: rgba(13, 46, 39, .82);
  color: var(--bw-paper);
  text-decoration: none;
  transition: background .28s var(--bw-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--bw-green-2);
}

.page-faq .faq-index__num {
  grid-area: num;
  font-size: 26px;
  line-height: 1;
  color: var(--bw-cyan);
  letter-spacing: -.02em;
}

.page-faq .faq-index__name {
  grid-area: name;
  font-family: var(--bw-narrow);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -.01em;
  line-height: 1.25;
}

.page-faq .faq-index__desc {
  grid-area: desc;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--bw-mute);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  position: relative;
  padding-block: clamp(38px, 6vw, 84px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group--basic { --faq-accent: var(--bw-paper); }
.page-faq .faq-group--sample { --faq-accent: var(--bw-mute); }
.page-faq .faq-group--offside { --faq-accent: var(--bw-cyan); }
.page-faq .faq-group--away { --faq-accent: var(--bw-gold); }
.page-faq .faq-group--revision { --faq-accent: var(--bw-flare); }
.page-faq .faq-group--contact { --faq-accent: var(--bw-green-2); }

.page-faq .faq-group__inner {
  display: grid;
  gap: var(--faq-gap);
}

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

.page-faq .faq-group__num {
  margin: 0;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  color: var(--faq-accent);
  letter-spacing: -.03em;
}

.page-faq .faq-group__title {
  margin: 12px 0 0;
  font-family: var(--bw-narrow);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -.02em;
  max-width: 20em;
}

.page-faq .faq-group__lede {
  margin: 12px 0 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--bw-mute);
}

.page-faq .faq-group__rail {
  display: none;
  margin: 0;
  font-family: var(--bw-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--faq-accent);
  writing-mode: vertical-rl;
  opacity: .75;
}

/* ---------- 问题组 ---------- */

.page-faq .faq-list {
  list-style: none;
  margin: clamp(24px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.page-faq .faq-item {
  position: relative;
  background: rgba(13, 46, 39, .52);
  border-left: 2px solid var(--bw-line);
  border-radius: 0 var(--bw-r-md) 0 var(--bw-r-md);
  transition: background .3s var(--bw-ease), border-color .3s var(--bw-ease);
}

.page-faq .faq-item:has(.faq-item__toggle[aria-expanded="true"]) {
  background: rgba(22, 70, 59, .62);
  border-left-color: var(--faq-accent);
}

.page-faq .faq-item__h {
  margin: 0;
}

.page-faq .faq-item__toggle {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  width: 100%;
  padding: 20px 20px 20px 22px;
  background: none;
  border: 0;
  color: inherit;
  font-family: var(--bw-narrow);
  font-weight: 800;
  font-size: clamp(17px, 2.5vw, 23px);
  line-height: 1.34;
  letter-spacing: -.01em;
  text-align: left;
  cursor: pointer;
  transition: color .25s var(--bw-ease);
}

.page-faq .faq-item__toggle:hover,
.page-faq .faq-item__toggle:focus-visible {
  color: var(--bw-cyan);
}

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

.page-faq .faq-item__glyph {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}

.page-faq .faq-item__glyph::before,
.page-faq .faq-item__glyph::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--faq-accent);
  transform: translateY(-50%);
}

.page-faq .faq-item__glyph::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform .32s var(--bw-ease);
}

.page-faq .faq-item__toggle[aria-expanded="true"] .faq-item__glyph::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .faq-item__panel {
  overflow: hidden;
}

.page-faq .faq-item__answer {
  margin: 0 20px 22px 22px;
  padding-left: 18px;
  border-left: 1px solid var(--bw-line-soft);
  max-width: 42em;
  font-size: clamp(14.5px, 1.5vw, 15.5px);
  line-height: 1.78;
  color: var(--bw-paper-soft);
}

.page-faq .faq-item__answer p {
  margin: 0 0 10px;
}

.page-faq .faq-item__answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__answer a {
  color: var(--bw-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 201, 193, .45);
}

.page-faq .faq-item__answer a:hover,
.page-faq .faq-item__answer a:focus-visible {
  border-bottom-color: var(--bw-cyan);
}

/* ---------- 术语 ---------- */

.page-faq .faq-term {
  position: relative;
  border-bottom: 1px dashed rgba(53, 201, 193, .7);
  cursor: help;
  outline-offset: 4px;
}

.page-faq .faq-term::after {
  content: attr(data-def);
  display: none;
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 6;
  width: max-content;
  max-width: 250px;
  padding: 10px 13px;
  border: 1px solid var(--bw-cyan);
  border-radius: 10px 3px 10px 3px;
  background: var(--bw-night-deep);
  box-shadow: var(--bw-shadow);
  color: var(--bw-paper);
  font-family: var(--bw-sans);
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
}

/* ---------- 图文对照 ---------- */

.page-faq .faq-figure {
  margin: clamp(26px, 4vw, 46px) 0 0;
  background: rgba(13, 46, 39, .4);
}

.page-faq .faq-figure .bw-media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure .bw-media__cap {
  display: block;
  padding: 10px 14px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--bw-mute);
  border-top: 1px solid var(--bw-line-soft);
}

/* ---------- 联系卡片 ---------- */

.page-faq .faq-contact-card {
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(150deg, rgba(22, 70, 59, .78), rgba(10, 22, 34, .78));
  border: 1px solid var(--bw-line-soft);
  border-left: 3px solid var(--bw-gold);
  border-radius: var(--faq-radius);
}

.page-faq .faq-contact-card__title {
  margin: 0 0 16px;
  font-family: var(--bw-narrow);
  font-weight: 800;
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: -.01em;
}

.page-faq .faq-contact-card__list {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact-card__row {
  display: grid;
  gap: 2px;
}

.page-faq .faq-contact-card__row dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--bw-mute);
}

.page-faq .faq-contact-card__row dd {
  margin: 0;
  font-size: 15.5px;
  color: var(--bw-gold);
  word-break: break-word;
}

.page-faq .faq-contact-card__note {
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--bw-mute);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact-card__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 28px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-group__inner {
    grid-template-columns: minmax(0, 1fr) 76px;
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-group__rail {
    display: block;
    position: sticky;
    top: calc(var(--bw-bar) + 34px);
    justify-self: end;
    padding-block: 6px;
  }

  .page-faq .faq-item__toggle {
    padding: 24px 26px 24px 28px;
  }

  .page-faq .faq-item__answer {
    margin: 0 26px 26px 28px;
  }
}

@media (hover: hover) and (min-width: 860px) {
  .page-faq .faq-term::after {
    display: block;
    opacity: 0;
    visibility: hidden;
    transition: opacity .18s ease, visibility .18s ease;
  }

  .page-faq .faq-term:hover::after,
  .page-faq .faq-term:focus-visible::after {
    opacity: 1;
    visibility: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__toggle,
  .page-faq .faq-item__glyph::after {
    transition: none;
  }
}