.page-faq {
  --faq-line: rgba(52, 227, 212, .18);
  --faq-line-soft: rgba(108, 123, 139, .24);
  --faq-panel-soft: rgba(19, 44, 66, .72);
  position: relative;
  isolation: isolate;
  background-color: var(--ink);
  background-image:
    radial-gradient(760px 460px at 86% -10%, rgba(52, 227, 212, .10), transparent 62%),
    radial-gradient(620px 400px at 0% 8%, rgba(255, 122, 47, .06), transparent 64%);
  background-repeat: no-repeat;
  color: var(--ice);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  padding-bottom: 88px;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq a {
  color: inherit;
  text-decoration: none;
}

.page-faq .mono {
  font-family: var(--font-mono);
}

/* ---------- 页头 ---------- */

.page-faq .faq-head {
  padding: 42px 0 34px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-head__eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
}

.page-faq .faq-head__title {
  margin: 14px 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 6.6vw, 52px);
  line-height: 1.16;
  letter-spacing: .03em;
  color: var(--white);
}

.page-faq .faq-head__lead {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ice);
}

.page-faq .faq-head__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-head__fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-md);
  background: var(--faq-panel-soft);
}

.page-faq .faq-head__fact-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 26px);
  letter-spacing: .02em;
  color: var(--cyan);
  line-height: 1.2;
}

.page-faq .faq-head__fact-label {
  font-size: 13px;
  color: var(--carbon);
  line-height: 1.5;
}

/* ---------- 双栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: 38px;
}

.page-faq .faq-main {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
}

.page-faq .faq-index {
  grid-column: 1;
  grid-row: 2;
  min-width: 0;
  padding: 16px 16px 14px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-lg);
  background: rgba(6, 17, 28, .55);
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--carbon);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__item {
  flex: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-pill);
  font-size: 14px;
  white-space: nowrap;
  color: var(--ice);
  transition: background-color var(--dur) ease, border-color var(--dur) ease, color var(--dur) ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--slate);
  border-color: rgba(52, 227, 212, .5);
  color: var(--white);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-index__foot {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--carbon);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 116px;
  padding-bottom: 26px;
}

.page-faq .faq-group + .faq-group {
  padding-top: 34px;
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  display: block;
  height: 2px;
  margin-bottom: 30px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(52, 227, 212, .35) 38%, rgba(52, 227, 212, 0) 100%);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 4.4vw, 30px);
  line-height: 1.3;
  letter-spacing: .05em;
  color: var(--carbon);
  transition: color var(--dur-slow) ease;
}

.page-faq .faq-group__title[data-inview],
.page-faq .faq-group__title:hover {
  color: var(--white);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-group__note {
  margin: 10px 0 20px;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--carbon);
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 18px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-deep);
}

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

.page-faq .faq-figure--wide img {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-figure--tall img {
  aspect-ratio: 20 / 13;
}

.page-faq .faq-figure__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--carbon);
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-md);
  background: var(--faq-panel-soft);
  overflow: hidden;
  transition: border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-faq .qa[open] {
  border-color: rgba(52, 227, 212, .42);
  background: linear-gradient(180deg, rgba(19, 44, 66, .92), rgba(10, 26, 43, .92));
}

.page-faq .qa[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--cyan);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--white);
  transition: color var(--dur) ease;
}

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

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

.page-faq .qa__q:hover {
  color: var(--cyan);
}

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border: 1px solid rgba(52, 227, 212, .55);
  border-radius: 50%;
  transition: border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
}

.page-faq .qa__mark::before {
  left: 4px;
  right: 4px;
  top: 7px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 4px;
  bottom: 4px;
  left: 7px;
  width: 2px;
  transition: opacity var(--dur) ease;
}

.page-faq .qa[open] .qa__mark {
  background: rgba(52, 227, 212, .16);
}

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

.page-faq .qa__q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__a {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .qa__cause {
  margin: 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--carbon);
}

.page-faq .qa__steps {
  display: grid;
  gap: 9px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .qa__step {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
}

.page-faq .qa__step-num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .qa__cause + .qa__steps {
  margin-top: 10px;
}

.page-faq .faq-link {
  color: var(--cyan);
  border-bottom: 1px solid rgba(52, 227, 212, .4);
  transition: border-color var(--dur) ease, color var(--dur) ease;
}

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

/* ---------- 联络块 ---------- */

.page-faq .faq-contact {
  margin-top: 40px;
  scroll-margin-top: 116px;
  padding: 24px 18px 26px;
  border: 1px solid rgba(255, 122, 47, .45);
  border-radius: var(--r-lg);
  background:
    linear-gradient(158deg, rgba(255, 122, 47, .12), rgba(19, 44, 66, .7) 48%, rgba(6, 17, 28, .92));
}

.page-faq .faq-contact__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 4.2vw, 28px);
  letter-spacing: .05em;
  color: var(--white);
}

.page-faq .faq-contact__lead {
  margin: 12px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ice);
}

.page-faq .faq-contact__info {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--faq-line-soft);
}

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

.page-faq .faq-contact__k {
  font-size: 13px;
  color: var(--carbon);
}

.page-faq .faq-contact__v {
  font-size: 15px;
  line-height: 1.7;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__prep {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-md);
  background: rgba(6, 17, 28, .45);
}

.page-faq .faq-contact__prep-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

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

.page-faq .faq-contact__prep-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ice);
}

.page-faq .faq-contact__prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-faq .faq-contact__cta {
  margin-top: 22px;
}

/* ---------- 滚动显现 ---------- */

.page-faq [data-reveal] {
  transition: opacity var(--dur-slow) ease, transform var(--dur-slow) ease;
}

.page-faq [data-reveal][data-inview] {
  opacity: 1;
  transform: none;
}

/* ---------- 桌面布局 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-head {
    padding: 54px 0 42px;
  }

  .page-faq .faq-contact {
    padding: 30px 28px 32px;
  }

  .page-faq .qa__q {
    padding: 17px 20px;
    font-size: 17px;
  }

  .page-faq .qa__a {
    padding: 16px 20px 22px 50px;
  }

  .page-faq .qa__cause,
  .page-faq .qa__step {
    font-size: 15px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 248px;
    gap: 46px;
    padding-top: 46px;
  }

  .page-faq .faq-main {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-index {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 104px;
    padding: 20px 18px 18px;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__item {
    flex: none;
  }

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--r-sm);
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: var(--panel);
  }

  .page-faq .faq-group {
    padding-bottom: 30px;
  }

  .page-faq .faq-group + .faq-group {
    padding-top: 42px;
  }

  .page-faq .faq-group + .faq-group::before {
    margin-bottom: 36px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 264px;
  }

  .page-faq .faq-head__lead {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
  }
}