.page-faq {
  --faq-hair-paper: rgba(28, 26, 22, 0.16);
  --faq-ink-soft: #46564f;
  --faq-ink-mute: #6b7d76;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background-color: var(--ink-green);
  background-image:
    repeating-linear-gradient(90deg, rgba(77, 224, 193, 0.055) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, rgba(77, 224, 193, 0.055) 0 1px, transparent 1px 84px);
  color: var(--mist);
  padding: clamp(22px, 4vw, 36px) 0 clamp(46px, 7vw, 84px);
  border-bottom: 1px solid rgba(77, 224, 193, 0.18);
}

.page-faq .faq-crumbs .crumbs__link {
  color: var(--slate);
  text-decoration: none;
}

.page-faq .faq-crumbs .crumbs__link:hover {
  color: var(--teal);
}

.page-faq .faq-crumbs .crumbs__current {
  color: var(--teal);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero__label {
  color: var(--amber);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 15em;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(29px, 5.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 48ch;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.9;
  color: rgba(231, 239, 234, 0.82);
}

.page-faq .faq-hero__panel {
  padding: clamp(18px, 3vw, 26px);
  background: var(--ink-green-2);
  border-left: 2px solid var(--amber);
}

.page-faq .faq-hero__panel-title {
  color: var(--slate);
}

.page-faq .faq-hero__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__list li + li {
  border-top: 1px solid var(--rule);
}

.page-faq .faq-hero__link {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  color: var(--mist);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.6;
  transition: color 0.2s ease;
}

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

.page-faq .faq-hero__n {
  flex: none;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  background: var(--paper);
  color: var(--brown);
  padding: clamp(36px, 5.5vw, 72px) 0 clamp(56px, 8vw, 104px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.5vw, 56px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-toc .toc__title {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--faq-ink-mute);
}

.page-faq .faq-toc .toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc .toc__item + .toc__item {
  margin-top: 2px;
}

.page-faq .faq-toc .toc__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0 9px 10px;
  border-left: 1px solid var(--faq-hair-paper);
  color: #4a5a54;
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.5;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-toc .toc__link:hover,
.page-faq .faq-toc .toc__link:focus-visible {
  color: var(--brown);
  border-left-color: var(--slate);
}

.page-faq .faq-toc .toc__link.is-active {
  color: var(--brown);
  border-left-color: var(--amber);
  font-weight: 600;
}

.page-faq .faq-toc .toc__idx {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--slate);
}

.page-faq .faq-toc .toc__link.is-active .toc__idx {
  color: var(--rust);
}

.page-faq .faq-hot {
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--faq-hair-paper);
}

.page-faq .faq-hot__title {
  color: var(--faq-ink-mute);
}

.page-faq .faq-hot__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hot__item + .faq-hot__item {
  margin-top: 12px;
}

.page-faq .faq-hot__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: #3a4a44;
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.6;
  transition: color 0.2s ease;
}

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

.page-faq .faq-hot__n {
  flex: none;
  padding: 1px 5px;
  background: var(--amber);
  color: var(--ink-green);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: 96px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(40px, 5.5vw, 72px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--faq-hair-paper);
}

.page-faq .faq-sec .chapter-head {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-faq .faq-sec .chapter-head__title {
  font-size: clamp(21px, 2.9vw, 29px);
}

.page-faq .faq-sec .chapter-head__note {
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--faq-ink-mute);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-hair-paper);
  background: var(--ink-green);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #7b8a84;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--faq-hair-paper);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid var(--faq-hair-paper);
}

.page-faq .faq-item__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: start;
  padding: clamp(14px, 2vw, 19px) 0;
  list-style: none;
  cursor: pointer;
  outline-offset: 3px;
}

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

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

.page-faq .faq-item__num {
  padding-top: 5px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
  transition: color 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--rust);
}

.page-faq .faq-item__q {
  font-size: clamp(15px, 1.9vw, 16.5px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--brown);
  transition: color 0.2s ease;
}

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

.page-faq .faq-item__sign {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--slate);
  transition: transform 0.22s ease, background 0.22s ease;
}

.page-faq .faq-item__sign::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1.5px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1.5px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__sign::before {
  background: var(--rust);
}

.page-faq .faq-item__body {
  padding: 2px 0 clamp(16px, 2.4vw, 22px);
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__body p + p {
  margin-top: 10px;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  background: var(--ink-green-2);
  color: var(--mist);
  padding: clamp(40px, 6vw, 72px) 0;
  border-top: 1px solid rgba(77, 224, 193, 0.16);
}

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
}

.page-faq .faq-cta__text .label {
  color: var(--amber);
}

.page-faq .faq-cta h2 {
  margin: 10px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(231, 239, 234, 0.8);
}

.page-faq .faq-cta__action .btn {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-item__head {
    gap: 18px;
  }

  .page-faq .faq-item__body {
    padding-left: 42px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-hero__link,
  .page-faq .faq-hot__link,
  .page-faq .faq-toc .toc__link {
    transition: none;
  }
}