.page-faq {
  --faq-radius: 3px;
  --faq-line: var(--paper-2);
  background: var(--paper);
  color: var(--ink);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(24px, 3.6vw, 40px) clamp(44px, 7vw, 84px);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -8% -6% -8% -12%;
  background: var(--night-2);
  clip-path: polygon(0 0, 60% 0, 36% 100%, 0 100%);
  z-index: -1;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(59, 232, 192, 0.32);
  border-radius: 6px;
  transform: rotate(16deg);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero__shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--line);
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--line);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.page-faq .faq-hero .breadcrumb__sep {
  color: var(--muted);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-faq .faq-hero__eyebrow {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-hero__eyebrow .num {
  font-size: 26px;
  letter-spacing: 0;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 4.8vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--line);
}

.page-faq .faq-search {
  max-width: 440px;
}

.page-faq .faq-search__label {
  display: block;
  margin-bottom: 9px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  padding: 13px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--paper);
  background: rgba(245, 239, 226, 0.06);
  border: 1px solid rgba(185, 214, 203, 0.34);
  border-radius: var(--faq-radius);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-search__input::placeholder {
  color: rgba(185, 214, 203, 0.65);
}

.page-faq .faq-search__input:focus {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-color: var(--cyan);
  background: rgba(245, 239, 226, 0.1);
}

.page-faq .faq-hero__figure {
  margin: 0;
  clip-path: polygon(0 12%, 9% 0, 100% 0, 100% 100%, 0 100%);
  background: var(--night-2);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 主体双栏 ============ */
.page-faq .faq-body {
  display: grid;
  gap: clamp(32px, 4.5vw, 52px);
  padding-block: clamp(38px, 6vw, 76px) clamp(48px, 8vw, 96px);
}

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

.page-faq .faq-index__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--moss);
}

.page-faq .faq-index__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-faq .faq-index__group-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--faq-line);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--night);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-index__group-link .num {
  font-size: 12px;
  color: var(--orange);
}

.page-faq .faq-index__group-link:hover,
.page-faq .faq-index__group-link:focus-visible {
  color: var(--moss);
  border-bottom-color: var(--moss);
}

.page-faq .faq-index__list {
  display: none;
  list-style: none;
  margin: 9px 0 0;
  padding: 0;
  gap: 7px;
}

.page-faq .faq-index__list a {
  display: block;
  padding-left: 10px;
  border-left: 2px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--night);
  border-left-color: var(--cyan);
}

/* ============ 问答流 ============ */
.page-faq .faq-flow {
  display: grid;
  gap: clamp(40px, 6vw, 72px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 104px;
}

.page-faq .faq-group__intro {
  margin: 14px 0 clamp(20px, 3vw, 30px);
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .faq-device {
  margin: 0 0 clamp(20px, 3vw, 30px) auto;
  max-width: 100%;
  background: var(--paper-2);
  padding: 6px;
  border-radius: var(--faq-radius);
}

.page-faq .faq-device img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-device .media__caption {
  display: block;
  padding: 9px 4px 4px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-list {
  display: grid;
  gap: 13px;
}

.page-faq .qa {
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  background: var(--paper);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--moss);
}

.page-faq .qa[open] {
  border-color: var(--moss);
  box-shadow: var(--shadow-raise);
}

.page-faq .qa__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 13px;
  align-items: center;
  padding: 16px 17px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__sum:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: -2px;
  border-radius: var(--faq-radius);
}

.page-faq .qa__no {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 2px;
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .qa__caret {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border: 1px solid var(--moss);
  border-radius: 50%;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .qa__caret::before,
.page-faq .qa__caret::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--moss);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .qa__caret::before {
  width: 9px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__caret::after {
  width: 1.5px;
  height: 9px;
  transform: translate(-50%, -50%);
}

.page-faq .qa[open] .qa__caret {
  background: var(--moss);
  border-color: var(--moss);
}

.page-faq .qa[open] .qa__caret::before,
.page-faq .qa[open] .qa__caret::after {
  background: var(--paper);
}

.page-faq .qa[open] .qa__caret::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__body {
  display: grid;
  gap: 10px;
  padding: 0 17px 20px 54px;
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .qa__body .qa__lead {
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  font-weight: 600;
  color: var(--ink);
}

.page-faq .qa__body .link-inline {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

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

/* ============ 收尾 ============ */
.page-faq .faq-cta {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-faq .faq-cta__shell {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-faq .faq-cta__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 24ch;
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--line);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-cta .btn--ghost {
  border-color: rgba(185, 214, 203, 0.45);
  color: var(--paper);
}

.page-faq .faq-cta .btn--ghost:hover,
.page-faq .faq-cta .btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-cta__links {
  display: grid;
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(185, 214, 203, 0.22);
}

.page-faq .faq-cta__links li {
  border-bottom: 1px solid rgba(185, 214, 203, 0.22);
}

.page-faq .faq-cta__links a {
  display: grid;
  gap: 4px;
  padding: 16px 2px;
  text-decoration: none;
  transition: padding-left 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-cta__links a:hover,
.page-faq .faq-cta__links a:focus-visible {
  padding-left: 12px;
}

.page-faq .faq-cta__link-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--paper);
}

.page-faq .faq-cta__links a:hover .faq-cta__link-title,
.page-faq .faq-cta__links a:focus-visible .faq-cta__link-title {
  color: var(--cyan);
}

.page-faq .faq-cta__link-note {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-faq .faq-device {
    max-width: 560px;
  }

  .page-faq .qa__body {
    padding-left: 60px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-faq .faq-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: none;
  }

  .page-faq .faq-cta__links li {
    border-bottom: none;
    border-top: 1px solid rgba(185, 214, 203, 0.22);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 268px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    padding-right: 6px;
  }

  .page-faq .faq-index__nav {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .page-faq .faq-index__list {
    display: grid;
  }
}

@media (min-width: 1240px) {
  .page-faq .qa__sum {
    padding: 18px 20px;
  }

  .page-faq .qa__body {
    padding: 0 20px 22px 62px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__caret,
  .page-faq .qa__caret::before,
  .page-faq .qa__caret::after,
  .page-faq .faq-cta__links a,
  .page-faq .faq-index__group-link,
  .page-faq .faq-index__list a,
  .page-faq .faq-search__input {
    transition: none;
  }
}