.page-faq {
  --faq-gutter: clamp(16px, 4vw, 40px);
  --faq-rule: #C9D6F0;
  --faq-soft: #F4F7FE;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 48px;
  background: var(--ink);
  color: var(--white);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -30%;
  width: 62%;
  height: 150%;
  background: linear-gradient(150deg, rgba(0, 87, 255, .55), rgba(0, 224, 198, .12) 60%, transparent 78%);
  transform: rotate(-7deg);
  pointer-events: none;
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .85rem;
}

.page-faq .faq-hero .breadcrumbs__link {
  color: var(--steel);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumbs__link:hover,
.page-faq .faq-hero .breadcrumbs__link:focus-visible {
  color: var(--lime);
}

.page-faq .faq-hero .breadcrumbs__sep {
  color: rgba(168, 182, 217, .55);
}

.page-faq .faq-hero .breadcrumbs__current {
  color: var(--white);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-faq .faq-hero__main .eyebrow {
  display: block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 4.4rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-status {
  border: var(--bd) solid rgba(255, 255, 255, .26);
  border-radius: var(--radius);
  background: rgba(6, 16, 51, .55);
  padding: 18px 20px;
}

.page-faq .faq-status__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel);
}

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

.page-faq .faq-status__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(168, 182, 217, .28);
}

.page-faq .faq-status__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-status__key {
  font-size: .9rem;
  color: var(--steel);
}

.page-faq .faq-status__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--white);
}

.page-faq .faq-status__row:first-child .faq-status__val {
  color: var(--lime);
  box-shadow: inset 0 -6px 0 rgba(180, 255, 57, .22);
}

/* ---------- 章节通用 ---------- */
.page-faq .chapter {
  position: relative;
  padding: 44px 0;
  scroll-margin-top: 92px;
}

.page-faq .chapter + .chapter::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--blue), var(--cyan) 56%, var(--lime));
}

.page-faq .chapter__head {
  margin-bottom: 26px;
}

.page-faq .chapter__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .18em;
  color: var(--blue);
}

.page-faq .chapter__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.6vw, 2.7rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .chapter__lede {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .section--dark .chapter__num {
  color: var(--lime);
}

.page-faq .section--dark .chapter__title {
  color: var(--white);
}

.page-faq .section--dark .chapter__lede {
  color: var(--steel);
}

/* ---------- 01 网格 ---------- */
.page-faq .faq-grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-search {
  margin-bottom: 24px;
}

.page-faq .faq-search__label {
  display: block;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.page-faq .faq-search__box {
  display: flex;
  align-items: center;
  gap: 10px;
  border: var(--bd) solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-hard);
  padding: 0 14px;
  transition: box-shadow var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}

.page-faq .faq-search__box:focus-within {
  box-shadow: 0 0 0 2px var(--lime) inset, var(--shadow-lift);
  transform: translate(-2px, -2px);
}

.page-faq .faq-search__caret {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--blue);
}

.page-faq .faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  padding: 15px 0;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
}

.page-faq .faq-search__input::placeholder {
  color: rgba(74, 90, 128, .6);
}

.page-faq .faq-search__hint {
  margin: 10px 0 0;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-index__link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border: var(--bd) solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-hard);
  text-decoration: none;
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease),
              background-color var(--t-base) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lift);
  background: var(--ice);
}

.page-faq .faq-index__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-faq .faq-index__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--blue);
  box-shadow: inset 0 -8px 0 rgba(180, 255, 57, .5);
}

.page-faq .faq-index__desc {
  font-size: .85rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-grid__aside .media-frame {
  margin: 0;
}

.page-faq .faq-grid__aside .media-frame img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--bd) solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  background: var(--ice);
}

/* ---------- 02 更新日志 ---------- */
.page-faq .faq-log {
  display: grid;
  gap: 28px;
}

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

.page-faq .faq-log__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--bd) solid rgba(255, 255, 255, .3);
  border-radius: var(--radius);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 16px 18px 16px 22px;
  border: var(--bd) solid rgba(255, 255, 255, .22);
  border-left: 6px solid var(--orange);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .04);
  transition: background-color var(--t-base) var(--ease),
              border-left-color var(--t-base) var(--ease),
              transform var(--t-base) var(--ease);
}

.page-faq .faq-steps__item:hover {
  background: rgba(0, 87, 255, .2);
  border-left-color: var(--lime);
  transform: translateX(4px);
}

.page-faq .faq-steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-faq .faq-steps__title {
  margin: 6px 0 0;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-faq .faq-steps__body {
  margin: 8px 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 面板 ---------- */
.page-faq .panel {
  display: grid;
  gap: 14px;
}

.page-faq .panel__item {
  position: relative;
  border: var(--bd) solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  scroll-margin-top: 96px;
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}

.page-faq .panel__item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lift);
}

.page-faq .panel__item[data-open="true"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--lime);
}

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

.page-faq .panel__trigger {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background-color var(--t-base) var(--ease);
}

.page-faq .panel__trigger:hover {
  background: var(--faq-soft);
}

.page-faq .panel__index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--blue);
  padding-top: 3px;
}

.page-faq .panel__text {
  flex: 1 1 auto;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .panel__sign {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: var(--bd) solid var(--ink);
  border-radius: var(--radius);
  position: relative;
  background: var(--ice);
}

.page-faq .panel__sign::before,
.page-faq .panel__sign::after {
  content: "";
  position: absolute;
  background: var(--ink);
}

.page-faq .panel__sign::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .panel__sign::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  transition: transform var(--t-base) var(--ease), opacity var(--t-base) var(--ease);
}

.page-faq .panel__item[data-open="true"] .panel__sign::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .panel__content {
  padding: 0 18px 18px 50px;
  border-top: 1px dashed var(--faq-rule);
  margin-top: 0;
}

.page-faq .panel__content p {
  margin: 14px 0 0;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 68ch;
}

/* ---------- 06 帮助 ---------- */
.page-faq .faq-help {
  background: var(--faq-soft);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-helpline {
  border: var(--bd) solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-hard);
  padding: 4px 20px;
}

.page-faq .faq-helpline__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--faq-rule);
}

.page-faq .faq-helpline__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-helpline__key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-faq .faq-helpline__val {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-helpline__row:first-child .faq-helpline__val {
  color: var(--blue);
  box-shadow: inset 0 -8px 0 rgba(180, 255, 57, .45);
}

.page-faq .faq-help__note {
  margin: 0 0 14px;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 62ch;
}

.page-faq .faq-help__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__links a {
  font-size: .95rem;
  color: var(--blue);
}

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

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 40px 0 72px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 52px;
    margin-top: 40px;
    align-items: end;
  }

  .page-faq .chapter {
    padding: 72px 0;
  }

  .page-faq .chapter__head {
    margin-bottom: 36px;
  }

  .page-faq .faq-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
  }

  .page-faq .faq-grid__aside {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-log {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .panel__content {
    padding-left: 72px;
    padding-right: 28px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .panel__item,
  .page-faq .faq-steps__item,
  .page-faq .faq-search__box {
    transition: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible,
  .page-faq .panel__item:hover,
  .page-faq .faq-steps__item:hover,
  .page-faq .faq-search__box:focus-within {
    transform: none;
  }
}