.page-faq {
  --faq-radius: 14px;
  --faq-gap: clamp(18px, 3vw, 30px);
  --faq-pad: clamp(18px, 2.6vw, 30px);
  --faq-amber-soft: rgba(232, 163, 61, .16);
  --faq-amber-line: rgba(232, 163, 61, .42);
  --faq-signal-soft: rgba(255, 90, 31, .12);
  --faq-shadow: 0 18px 44px -30px rgba(11, 16, 48, .75);
  --faq-line-soft: rgba(42, 47, 69, .1);
  --faq-line-mid: rgba(42, 47, 69, .18);
  position: relative;
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

.page-faq a {
  color: inherit;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(108px, 15vw, 168px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(232, 163, 61, .16), transparent 58%),
    radial-gradient(90% 80% at 4% 0%, rgba(255, 90, 31, .14), transparent 54%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: clamp(-40px, -2vw, 0px);
  bottom: 0;
  width: clamp(180px, 30vw, 420px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--faq-amber-line));
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-hero__lead .crumbs {
  margin-bottom: clamp(14px, 2vw, 22px);
  color: var(--mist);
  font-size: 13px;
}

.page-faq .faq-hero__lead .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line-dark-strong);
  padding-bottom: 2px;
}

.page-faq .faq-hero__lead .crumbs a:hover {
  color: var(--white);
  border-bottom-color: var(--signal);
}

.page-faq .faq-hero__lead .crumbs span[aria-hidden] {
  margin: 0 8px;
  color: var(--slate);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.08;
  letter-spacing: -.03em;
  font-weight: 900;
  max-width: 20ch;
}

.page-faq .faq-hero__intro {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .82);
}

.page-faq .faq-hero__quick {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-faq .faq-chip {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  background: rgba(20, 27, 71, .55);
}

.page-faq .faq-chip__num {
  font-size: 22px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -.02em;
}

.page-faq .faq-chip__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-hero__panel {
  padding: var(--faq-pad);
  border: 1px solid var(--line-dark-strong);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(11, 16, 48, .72), rgba(20, 27, 71, .88));
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-panel__head {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate);
  font-family: var(--font-mono);
}

.page-faq .faq-hero__pair + .faq-hero__pair {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-hero__panel .langpair__tag {
  color: var(--signal);
  border-color: var(--faq-signal-soft);
}

.page-faq .faq-hero__panel .langpair__cn {
  color: var(--white);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-hero__panel .langpair__alt {
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- 主题分类 ---------- */
.page-faq .faq-section--nav {
  padding: clamp(40px, 6vw, 80px) 0 clamp(48px, 7vw, 96px);
  background: var(--paper);
  color: var(--text-dark);
}

.page-faq .faq-nav__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-nav__intro .eyebrow {
  color: var(--signal-deep, #E04A12);
}

.page-faq .faq-nav__intro h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--text-dark);
  max-width: 22ch;
}

.page-faq .faq-nav__desc {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-mute);
}

.page-faq .faq-nav__visual {
  border: 1px solid var(--faq-line-mid);
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: linear-gradient(140deg, var(--mist), #EDF1F4 60%, #F7F9FA);
}

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

.page-faq .faq-nav__grid--tree {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-tree {
  border: 1px solid var(--faq-line-mid);
  border-radius: var(--faq-radius);
  background: var(--white);
  padding: 18px 18px 8px;
}

.page-faq .faq-tree__head {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--slate);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

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

.page-faq .faq-tree__list::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: var(--faq-line-mid);
}

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

.page-faq .faq-tree__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 4px 10px 12px;
  font-size: 15px;
  color: var(--text-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-line-soft);
  position: relative;
  transition: color .2s var(--ease);
}

.page-faq .faq-tree__link::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 9px;
  height: 1px;
  background: var(--slate);
  transform: translateY(-50%);
  transition: background .2s var(--ease), width .2s var(--ease);
}

.page-faq .faq-tree__link:hover,
.page-faq .faq-tree__link:focus-visible {
  color: var(--signal-deep, #E04A12);
}

.page-faq .faq-tree__link:hover::before,
.page-faq .faq-tree__link:focus-visible::before {
  background: var(--signal);
  width: 14px;
}

.page-faq .faq-tree__count {
  font-size: 12px;
  color: var(--slate);
}

/* ---------- 问答工作台 ---------- */
.page-faq .faq-workbench {
  min-width: 0;
}

.page-faq .faq-workbench__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  padding: 14px 16px;
  border: 1px solid var(--faq-line-mid);
  border-radius: var(--faq-radius);
  background: linear-gradient(120deg, #FFFFFF, #F2F4F7);
}

.page-faq .faq-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-faq .faq-controls .btn {
  color: var(--text-dark);
  border-color: var(--faq-line-mid);
  background: var(--white);
}

.page-faq .faq-controls .btn:hover {
  border-color: var(--signal);
  color: var(--signal-deep, #E04A12);
}

.page-faq .faq-controls .btn[aria-pressed="true"] {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--white);
}

.page-faq .tool--save {
  color: var(--text-dark);
  border-color: var(--faq-line-mid);
  background: transparent;
}

.page-faq .tool--save[aria-pressed="true"] {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--white);
}

.page-faq .faq-workbench__meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-mute);
}

.page-faq .faq-workbench__meta .mono {
  color: var(--text-dark);
  font-weight: 700;
}

.page-faq .faq-hint {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--signal);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-faq .faq-topic {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-topic__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line-mid);
}

.page-faq .faq-topic__index {
  grid-row: span 2;
  font-size: 26px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -.03em;
  background: var(--faq-amber-soft);
  border: 1px solid var(--faq-amber-line);
  border-radius: 8px;
  padding: 4px 10px;
  align-self: start;
}

.page-faq .faq-topic__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 28px);
  letter-spacing: -.02em;
  color: var(--text-dark);
}

.page-faq .faq-topic__desc {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-mute);
  max-width: 60ch;
}

.page-faq .faq-list {
  margin-top: 18px;
  display: grid;
  gap: 12px;
}

.page-faq .qa {
  border: 1px solid var(--faq-line-mid);
  border-radius: var(--faq-radius);
  background: var(--white);
  box-shadow: 0 1px 0 rgba(11, 16, 48, .03);
  transition: border-color .2s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .qa:hover,
.page-faq .qa[open] {
  border-color: rgba(255, 90, 31, .38);
  box-shadow: 0 14px 34px -30px rgba(11, 16, 48, .7);
}

.page-faq .qa[hidden] {
  display: none;
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-dark);
}

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

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

.page-faq .qa__num {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--slate);
  padding-top: 3px;
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
  font-weight: 500;
}

.page-faq .qa__tag {
  flex: 0 0 auto;
  align-self: center;
}

.page-faq .qa__mark {
  flex: 0 0 auto;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--signal);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}

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

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

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 18px 18px 46px;
  border-left: 2px solid var(--signal);
  margin-left: 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mute);
}

.page-faq .qa__body p {
  margin: 0;
}

.page-faq .qa__body a {
  color: var(--signal-deep, #E04A12);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-amber-line);
}

.page-faq .qa__body a:hover {
  border-bottom-color: var(--signal);
}

.page-faq .qa__body .mono {
  color: var(--text-dark);
  font-weight: 700;
}

/* ---------- 排查路径 ---------- */
.page-faq .faq-topic--check .faq-check__grid {
  margin-top: 22px;
  display: grid;
  gap: var(--faq-gap);
}

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

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--faq-line-mid);
  border-radius: var(--faq-radius);
  background: linear-gradient(120deg, #FFFFFF, #F6F8F9);
}

.page-faq .faq-steps__num {
  margin: 0;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--signal);
  color: var(--white);
  font-size: 15px;
  font-weight: 700;
}

.page-faq .faq-steps__body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--text-dark);
}

.page-faq .faq-steps__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-faq .faq-check__figure {
  margin: 0;
  border: 1px solid var(--faq-line-mid);
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: linear-gradient(150deg, var(--mist), #EDF1F4);
}

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

.page-faq .faq-check__figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-mute);
  background: rgba(255, 255, 255, .7);
  border-top: 1px solid var(--faq-line-soft);
}

/* ---------- 联系 ---------- */
.page-faq .faq-contact {
  padding: clamp(46px, 6vw, 86px) 0;
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: var(--faq-gap);
}

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

.page-faq .faq-contact__lead h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -.02em;
  max-width: 22ch;
}

.page-faq .faq-contact__intro {
  margin: 14px 0 22px;
  max-width: 50ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-contact__cards {
  display: grid;
  gap: 14px;
}

.page-faq .faq-ccard {
  padding: var(--faq-pad);
  border: 1px solid var(--line-dark-strong);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(20, 27, 71, .86), rgba(11, 16, 48, .9));
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-ccard__title {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--slate);
  font-family: var(--font-mono);
}

.page-faq .faq-ccard__line {
  margin: 0 0 10px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -.01em;
  word-break: break-all;
}

.page-faq .faq-ccard__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-nav__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-faq .faq-nav__grid--tree {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }

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

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

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

  .page-faq .faq-ccard--wide {
    grid-column: span 2;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-tree {
    position: sticky;
    top: 108px;
  }
}

@media (max-width: 759px) {
  .page-faq .faq-tree__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-left: 0;
  }

  .page-faq .faq-tree__list::before {
    display: none;
  }

  .page-faq .faq-tree__item + .faq-tree__item {
    margin-top: 0;
  }

  .page-faq .faq-tree__link {
    border: 1px solid var(--faq-line-mid);
    border-radius: 999px;
    padding: 8px 12px;
    gap: 8px;
    background: var(--white);
    font-size: 14px;
  }

  .page-faq .faq-tree__link::before {
    display: none;
  }

  .page-faq .faq-topic__head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 4px 12px;
  }

  .page-faq .qa__summary {
    padding: 14px 14px;
    font-size: 15.5px;
    flex-wrap: wrap;
  }

  .page-faq .qa__body {
    padding: 0 14px 16px 30px;
    margin-left: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .faq-tree__link,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after {
    transition: none !important;
  }
}