.page-faq {
  --faq-gap: clamp(28px, 4.5vw, 56px);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(24px, 5vw, 56px) clamp(40px, 7vw, 84px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(57, 245, 200, 0.14), transparent 58%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 72%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(20px, 4vw, 36px);
}

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

.page-faq .faq-hero__main .display {
  margin: 10px 0 18px;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__main .lede {
  max-width: 46ch;
  color: var(--muted);
}

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

.page-faq .faq-hero__visual .media {
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

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

.page-faq .media__caption {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* 首屏高频入口 */
.page-faq .faq-quick {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-quick__item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-quick__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 14px 2px;
  text-decoration: none;
  color: var(--paper);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-quick__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--sand);
}

.page-faq .faq-quick__text strong {
  display: block;
  font-size: 1.0625rem;
  font-weight: 650;
  line-height: 1.4;
}

.page-faq .faq-quick__text span {
  display: block;
  margin-top: 3px;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

.page-faq .faq-quick__arrow {
  color: var(--pulse);
  font-family: var(--font-mono);
  transition: transform 0.18s var(--ease);
}

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

.page-faq .faq-quick__link:hover .faq-quick__arrow,
.page-faq .faq-quick__link:focus-visible .faq-quick__arrow {
  transform: translateX(5px);
}

/* 目录 + 问答主体 */
.page-faq .faq-body {
  padding-block: clamp(32px, 6vw, 80px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-dir {
  min-width: 0;
  border-left: 1px solid var(--line);
  padding-left: 16px;
}

.page-faq .faq-ring {
  width: 54px;
  height: 54px;
  display: block;
  color: var(--pulse);
  opacity: 0.85;
  margin-bottom: 12px;
}

.page-faq .faq-dir__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-faq .faq-dir__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-dir__item {
  flex: 0 0 auto;
}

.page-faq .faq-dir__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-dir__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--sand);
  letter-spacing: 0.06em;
}

.page-faq .faq-dir__link:hover,
.page-faq .faq-dir__link:focus-visible {
  color: var(--pulse);
  border-color: var(--pulse);
}

.page-faq .faq-dir .note {
  margin: 14px 0 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

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

.page-faq .faq-group {
  margin-bottom: clamp(38px, 5vw, 68px);
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 8px 14px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--sand);
  border: 1px solid var(--line);
  padding: 3px 7px;
  line-height: 1.2;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--muted);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

/* 折叠问答 */
.page-faq .faq-list {
  margin-top: 4px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

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

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

.page-faq .faq-item__mark {
  position: relative;
  margin-left: auto;
  margin-top: 0.4em;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--pulse);
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

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

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

.page-faq .faq-item__a {
  margin: 0 0 18px 4px;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--pulse);
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--muted);
}

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

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

.page-faq .faq-item__a a {
  color: var(--pulse);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* 数字锚点 */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-stat {
  background: var(--ink-2);
  padding: 16px 18px;
}

.page-faq .faq-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.5vw, 2.3rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--pulse);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure .media {
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

/* 联系信息块 */
.page-faq .faq-contact {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 26px);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__row:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-contact__key {
  flex: 0 0 auto;
  min-width: 52px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--sand);
  padding-top: 0.25em;
}

.page-faq .faq-contact__val {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__val a {
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 245, 200, 0.4);
}

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

.page-faq .faq-contact__note {
  margin: 14px 0 0;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--muted);
}

/* 结尾信号条 */
.page-faq .faq-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(18px, 4vw, 30px);
  display: grid;
  gap: 16px;
  border-left: 3px solid var(--signal);
  background: linear-gradient(100deg, var(--panel) 0%, var(--ink-2) 70%);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.8vw, 1.55rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-faq .faq-hero__visual {
    margin-top: 8px;
  }

  .page-faq .faq-quick {
    max-width: 34rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 236px minmax(0, 1fr);
  }

  .page-faq .faq-dir {
    position: sticky;
    top: 32px;
  }

  .page-faq .faq-dir__list {
    display: block;
    overflow: visible;
    margin-top: 14px;
    padding-bottom: 0;
  }

  .page-faq .faq-dir__item {
    display: block;
  }

  .page-faq .faq-dir__link {
    display: flex;
    width: 100%;
    padding: 9px 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .faq-group {
    scroll-margin-top: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__arrow,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-quick__link,
  .page-faq .faq-item__q {
    transition: none;
  }

  .page-faq .faq-quick__link:hover .faq-quick__arrow {
    transform: none;
  }
}