.page-faq {
  --faq-line: var(--edge);
  --faq-panel-bg: rgba(255, 255, 255, 0.72);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(22px, 3vw, 40px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(72px, 14vw, 196px);
  height: 4px;
  background: var(--lime);
}

.page-faq .faq-hero__latin {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-hero__title {
  margin: 0.16em 0 0.12em;
  font-family: var(--f-display);
  font-size: clamp(46px, 9.5vw, 108px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.page-faq .faq-hero__lede {
  max-width: 36em;
  margin: 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 34px) 0 0;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-stats__item {
  background: var(--paper);
  padding: 14px clamp(12px, 1.4vw, 18px);
}

.page-faq .faq-stats__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .faq-stats__value {
  margin: 0;
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  color: var(--green);
}

.page-faq .faq-stats__value small {
  margin-left: 5px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding-top: clamp(26px, 4vw, 54px);
}

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

.page-faq .faq-nav__label {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-nav__link {
  display: flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
  padding: 9px 13px;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--faq-line);
  background: transparent;
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  color: var(--ink);
  transition: border-color var(--speed) var(--ease), background-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

.page-faq .faq-nav__no {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-left-color: var(--lime);
  background: var(--white);
}

.page-faq .faq-nav__link:hover .faq-nav__no,
.page-faq .faq-nav__link:focus-visible .faq-nav__no {
  color: var(--green);
}

/* ---------- 工具栏 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: clamp(18px, 2.6vw, 30px);
  border-bottom: 2px solid var(--green);
}

.page-faq .faq-toolbar__hint {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-expand-btn {
  cursor: pointer;
  user-select: none;
}

.page-faq .faq-expand:checked ~ .faq-main .faq-expand-btn__open {
  display: none;
}

.page-faq .faq-expand:not(:checked) ~ .faq-main .faq-expand-btn__close {
  display: none;
}

/* ---------- 分类区块 ---------- */
.page-faq .qa-group {
  margin-bottom: clamp(34px, 5vw, 66px);
  scroll-margin-top: clamp(72px, 12vh, 120px);
}

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

.page-faq .qa-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .qa-group__no {
  margin: 0;
  padding: 3px 9px;
  background: var(--green);
  color: var(--lime);
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.page-faq .qa-group__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(24px, 3.5vw, 40px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.page-faq .qa-group__desc {
  flex-basis: 100%;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .qa__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 6px;
  cursor: pointer;
  transition: background-color var(--speed) var(--ease);
}

.page-faq .qa__head:hover {
  background: var(--white);
}

.page-faq .qa__toggle:focus-visible ~ .qa__head {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .qa__no {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-faq .qa__q {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  word-break: break-word;
}

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border: 1px solid var(--ink);
  transition: border-color var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--ink);
  transition: transform var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

.page-faq .qa__sign::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .qa__sign::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .qa__toggle:checked ~ .qa__head .qa__sign,
.page-faq .faq-expand:checked ~ .faq-main .qa__sign {
  border-color: var(--green);
  background: var(--green);
}

.page-faq .qa__toggle:checked ~ .qa__head .qa__sign::before,
.page-faq .qa__toggle:checked ~ .qa__head .qa__sign::after,
.page-faq .faq-expand:checked ~ .faq-main .qa__sign::before,
.page-faq .faq-expand:checked ~ .faq-main .qa__sign::after {
  background: var(--lime);
}

.page-faq .qa__toggle:checked ~ .qa__head .qa__sign::after,
.page-faq .faq-expand:checked ~ .faq-main .qa__sign::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .qa__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 220ms var(--ease);
}

.page-faq .qa__inner {
  overflow: hidden;
}

.page-faq .qa__toggle:checked ~ .qa__panel,
.page-faq .faq-expand:checked ~ .faq-main .qa__panel {
  grid-template-rows: 1fr;
}

.page-faq .qa__body {
  padding: 2px 6px 22px 34px;
}

.page-faq .qa__p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  max-width: 38em;
}

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

.page-faq .qa__body a,
.page-faq .support-note a {
  color: var(--green-mid);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__body a:hover,
.page-faq .support-note a:hover {
  color: var(--green);
  text-decoration-thickness: 2px;
}

/* ---------- 步骤与列表 ---------- */
.page-faq .steps {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15.5px;
  line-height: 1.72;
}

.page-faq .steps__no {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  background: var(--green);
  color: var(--lime);
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-faq .plain-list {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .plain-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15.5px;
  line-height: 1.72;
}

.page-faq .plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 2px;
  background: var(--green-mid);
}

.page-faq .plain-list strong {
  font-weight: 700;
}

.page-faq .tip {
  margin: 16px 0 0;
  padding: 11px 14px;
  background: var(--white);
  border-left: 3px solid var(--red);
  font-size: 14.5px;
  line-height: 1.72;
  max-width: 40em;
}

/* ---------- 版本对照 ---------- */
.page-faq .pick {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .pick__col {
  background: var(--white);
  padding: 16px clamp(14px, 1.6vw, 20px);
}

.page-faq .pick__tag {
  margin: 0 0 8px;
}

.page-faq .pick__title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

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

.page-faq .pick__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.66;
  color: var(--ink);
}

.page-faq .pick__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 7px;
  height: 2px;
  background: var(--lime);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  border: 1px solid var(--faq-line);
  background: var(--white);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: grayscale(1) contrast(1.06);
}

.page-faq .faq-figure figcaption {
  padding: 10px clamp(12px, 1.4vw, 16px);
  border-top: 1px solid var(--faq-line);
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 人工支持（深色面板） ---------- */
.page-faq .qa-group--support {
  background: var(--green);
  color: var(--paper);
  padding: clamp(22px, 3.4vw, 42px);
  margin-bottom: 0;
}

.page-faq .qa-group--support .qa-group__head {
  border-bottom-color: rgba(244, 241, 232, 0.28);
}

.page-faq .qa-group--support .qa-group__no {
  background: var(--lime);
  color: var(--green);
}

.page-faq .qa-group--support .qa-group__title {
  color: var(--white);
}

.page-faq .qa-group--support .qa-group__desc {
  color: rgba(244, 241, 232, 0.78);
}

.page-faq .support-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .support-lead {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 241, 232, 0.9);
}

.page-faq .plain-list--light li {
  color: var(--paper);
}

.page-faq .plain-list--light li::before {
  background: var(--lime);
}

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

.page-faq .contact-list__item {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(244, 241, 232, 0.2);
}

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

.page-faq .contact-list__key {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .contact-list__val {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .contact-list__val--mono {
  font-family: var(--f-mono);
  font-size: 15px;
  color: var(--white);
}

.page-faq .support-note {
  margin: 16px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 241, 232, 0.82);
  max-width: 40em;
}

.page-faq .support-note a {
  color: var(--lime);
}

.page-faq .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(16px, 2.4vw, 26px);
  border-top: 1px solid rgba(244, 241, 232, 0.24);
}

.page-faq .support-actions__ghost {
  border-color: var(--paper);
  color: var(--paper);
}

.page-faq .support-actions__ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: clamp(76px, 11vh, 112px);
    align-self: start;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }

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

  .page-faq .faq-nav__link {
    border: 0;
    border-left: 3px solid transparent;
    padding: 10px 12px 10px 14px;
    background: transparent;
  }

  .page-faq .faq-nav__link:hover,
  .page-faq .faq-nav__link:focus-visible {
    border-left-color: var(--lime);
    background: var(--white);
  }

  .page-faq .qa__body {
    padding-left: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__panel,
  .page-faq .qa__sign,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .qa__head,
  .page-faq .faq-nav__link {
    transition: none;
  }
}