.page-faq {
  --faq-rail: 104px;
  --faq-line: rgba(198, 207, 216, 0.22);
  --faq-soft: rgba(242, 233, 218, 0.78);
  --faq-soft-dim: rgba(11, 21, 32, 0.68);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-faq [id] {
  scroll-margin-top: 168px;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  color: var(--paper);
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(40px, 8vw, 96px) 0 clamp(28px, 5vw, 52px);
  position: relative;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(24px, 5vw, 48px);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-faq .faq-hero .breadcrumbs a {
  color: var(--grey);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumbs a:hover {
  color: var(--cyan);
}

.page-faq .faq-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--grey);
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  font-size: clamp(36px, 8.6vw, 92px);
  line-height: 1;
  letter-spacing: -0.035em;
  max-width: 15em;
}

.page-faq .faq-hero__lede {
  margin: clamp(20px, 3.5vw, 32px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--faq-soft);
}

.page-faq .faq-hero__stripe {
  height: 6px;
  margin-top: clamp(32px, 5vw, 56px);
  background:
    linear-gradient(90deg,
      var(--red) 0 33%,
      var(--ink) 33% 35%,
      var(--yellow) 35% 64%,
      var(--ink) 64% 66%,
      var(--cyan) 66% 100%);
}

/* ---------- 索引带 ---------- */
.page-faq .faq-index-band {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(24px, 4vw, 40px) 0;
  border-top: 3px solid var(--ink-deep);
  border-bottom: 3px solid var(--ink-deep);
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  border-top: 3px solid var(--ink);
  transition: background var(--step-fast), color var(--step-fast);
}

.page-faq .faq-index__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--red);
  transition: color var(--step-fast);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--yellow);
}

/* ---------- 主题分组 ---------- */
.page-faq .faq-group {
  padding: clamp(44px, 7vw, 84px) 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 30px);
}

.page-faq .faq-group__rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-group__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-faq .faq-group__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-group__head h2 {
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.025em;
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  border-left: 4px solid transparent;
  background: transparent;
  transition: background var(--step-fast), border-left-color var(--step-fast);
}

.page-faq .faq-item:hover {
  background: var(--panel);
}

.page-faq .faq-item[open] {
  background: var(--panel);
  border-left-color: var(--cyan);
}

.page-faq .faq-item__q {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 16px;
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--step-fast);
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--cyan);
}

.page-faq .faq-item__marker {
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  margin-top: 4px;
  position: relative;
  border: 2px solid var(--grey);
  transition: border-color var(--step-fast);
}

.page-faq .faq-item__marker::before,
.page-faq .faq-item__marker::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--grey);
  transform: translate(-50%, -50%);
  transition: opacity var(--step-fast), background var(--step-fast);
}

.page-faq .faq-item__marker::before {
  width: 8px;
  height: 2px;
}

.page-faq .faq-item__marker::after {
  width: 2px;
  height: 8px;
}

.page-faq .faq-item[open] .faq-item__marker {
  border-color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__marker::before,
.page-faq .faq-item[open] .faq-item__marker::after {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__marker::after {
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 16px 20px 44px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--faq-soft);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 200, 0.45);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 图文 ---------- */
.page-faq .faq-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  max-width: 720px;
  border: 2px solid var(--line);
  background: var(--ink-deep);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

/* ---------- 中段氛围图 ---------- */
.page-faq .faq-break {
  padding: clamp(36px, 6vw, 64px) 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-break__figure {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink-deep);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-break__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-faq .faq-break__figure figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-faq .faq-break__stats {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(48px, 8vw, 92px) 0;
  border-top: 5px solid var(--red);
}

.page-faq .faq-contact h2 {
  color: var(--ink);
}

.page-faq .faq-contact .faq-group__num {
  color: var(--red);
}

.page-faq .faq-contact .faq-group__label {
  color: rgba(11, 21, 32, 0.52);
}

.page-faq .faq-contact .faq-group__note {
  color: var(--faq-soft-dim);
}

.page-faq .faq-channel {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 40px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 32px;
}

.page-faq .faq-channel__item {
  border-top: 3px solid var(--ink);
  padding: 16px 0 22px;
}

.page-faq .faq-channel__title {
  margin: 12px 0 8px;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-channel__item p {
  margin: 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-soft-dim);
}

.page-faq .faq-channel__item p a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--red);
}

.page-faq .faq-desk {
  background: var(--ink);
  color: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: var(--hard-shadow);
  padding: clamp(20px, 3vw, 32px);
}

.page-faq .faq-desk__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 16px;
}

.page-faq .faq-desk__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-desk__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid rgba(198, 207, 216, 0.18);
}

.page-faq .faq-desk__key {
  flex: 0 0 60px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.page-faq .faq-desk__val {
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-desk__note {
  margin: 0 0 22px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--grey);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-faq .faq-back {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-back:hover {
  color: var(--yellow);
}

@media (min-width: 640px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-group__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-faq .faq-group__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding-top: 8px;
  }

  .page-faq .faq-group__label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.34em;
  }

  .page-faq .faq-figure {
    margin-left: auto;
  }

  .page-faq .faq-item__q {
    padding: 20px 20px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 24px 48px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__marker,
  .page-faq .faq-item__marker::before,
  .page-faq .faq-item__marker::after,
  .page-faq .faq-index__link,
  .page-faq .faq-index__num {
    transition: none;
  }
}