.page-faq {
  --faq-gap: clamp(16px, 2.2vw, 28px);
  --faq-cut: 12px;
  --faq-line: rgba(46, 58, 70, .9);
  --faq-panel: linear-gradient(160deg, rgba(26, 31, 38, .94), rgba(17, 22, 27, .94));
  padding-block: clamp(18px, 3vw, 36px) clamp(64px, 10vw, 120px);
  background:
    radial-gradient(120% 55% at 94% -8%, rgba(77, 208, 225, .13), transparent 60%),
    radial-gradient(85% 46% at -8% 6%, rgba(198, 255, 0, .08), transparent 62%);
  overflow-x: clip;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 28px);
}

.page-faq .breadcrumb__current {
  color: var(--text-dim);
  font-size: .86rem;
  letter-spacing: .04em;
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  position: relative;
  padding-block: clamp(8px, 2vw, 20px) clamp(24px, 4vw, 40px);
}

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

.page-faq .faq-cover__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(32px, 7.4vw, 68px);
  line-height: 1.02;
  letter-spacing: -.022em;
  color: var(--white);
  text-wrap: balance;
}

.page-faq .faq-cover__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 16px;
  font-size: .85rem;
  letter-spacing: .04em;
  color: var(--white);
  text-decoration: none;
  background: rgba(26, 31, 38, .86);
  border: 1px solid var(--line);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background var(--speed) ease, color var(--speed) ease, border-color var(--speed) ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  color: var(--carbon);
  background: var(--lime);
  border-color: var(--lime);
}

.page-faq .faq-cover__panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--faq-panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-faq .faq-cover__panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--lime), var(--ice));
}

.page-faq .faq-cover__panel-title {
  margin: 0 0 16px;
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

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

.page-faq .faq-facts li {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.page-faq .faq-facts__k {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--ice);
}

.page-faq .faq-facts__v {
  font-size: .95rem;
  line-height: 1.6;
  color: var(--white);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(28px, 4.6vw, 56px);
}

.page-faq .faq-toc {
  padding: 18px 20px;
  background: rgba(17, 22, 27, .72);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-faq .faq-toc__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__item {
  border-bottom: 1px solid rgba(46, 58, 70, .5);
}

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

.page-faq .faq-toc .toc__link {
  display: block;
  padding: 10px 0;
  font-size: .9rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--speed) ease, transform var(--speed) ease;
}

.page-faq .faq-toc .toc__link:hover,
.page-faq .faq-toc .toc__link:focus-visible {
  color: var(--lime);
  transform: translateX(3px);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  position: relative;
  padding-top: clamp(20px, 3vw, 34px);
  margin-top: clamp(30px, 5vw, 58px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-chapter:first-child {
  margin-top: 0;
}

.page-faq .faq-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-chapter__no {
  font-size: .95rem;
  letter-spacing: .12em;
  color: var(--lime);
}

.page-faq .faq-chapter--ice .faq-chapter__no {
  color: var(--ice);
}

.page-faq .faq-chapter--amber .faq-chapter__no {
  color: var(--amber);
}

.page-faq .faq-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(21px, 3.4vw, 32px);
  letter-spacing: -.012em;
  color: var(--white);
}

.page-faq .faq-chapter__lead {
  margin: 12px 0 20px;
  max-width: 66ch;
  font-size: .98rem;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 20px;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, var(--faq-cut) 100%, 0 calc(100% - var(--faq-cut)));
  transition: border-color var(--speed) ease, transform var(--speed) ease;
}

.page-faq .faq-step:hover {
  border-color: rgba(198, 255, 0, .55);
  transform: translateY(-2px);
}

.page-faq .faq-step__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--carbon);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.page-faq .faq-step__title {
  margin: 4px 0 6px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--text-dim);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
  transition: color var(--speed) ease;
}

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

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

.page-faq .faq-item__q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--lime);
  transition: transform var(--speed) ease;
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(45deg);
}

.page-faq .faq-item__a {
  padding: 0 0 18px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 68ch;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-item__a a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 208, 225, .4);
}

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

/* ---------- 数字与图 ---------- */
.page-faq .faq-stats {
  margin: 4px 0 24px;
}

.page-faq .faq-stats .stat__value {
  color: var(--lime);
}

.page-faq .faq-figure {
  margin: 0 0 24px;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  overflow: hidden;
}

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

.page-faq .faq-figure__cap {
  padding: 12px 18px 16px;
  font-size: .82rem;
  letter-spacing: .03em;
  color: var(--text-faint);
  border-top: 1px solid rgba(46, 58, 70, .6);
}

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

.page-faq .faq-split__media .media {
  margin: 0;
}

.page-faq .faq-split__media .media__frame {
  border: 1px solid var(--line);
  background: var(--faq-panel);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  overflow: hidden;
}

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

.page-faq .faq-split__media .media__caption {
  margin: 12px 0 0;
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--text-faint);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  margin-top: 26px;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

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

.page-faq .faq-contact__row {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(46, 58, 70, .7);
}

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

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-faq .faq-contact__v {
  font-size: .95rem;
  line-height: 1.65;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--text-faint);
}

.page-faq .faq-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-cta-row .btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-chapter {
    padding-left: 26px;
  }

  .page-faq .faq-chapter::before {
    content: "";
    position: absolute;
    left: 0;
    top: clamp(22px, 3vw, 36px);
    bottom: 4px;
    width: 2px;
    background: linear-gradient(180deg, var(--lime), rgba(198, 255, 0, 0));
  }

  .page-faq .faq-chapter--ice::before {
    background: linear-gradient(180deg, var(--ice), rgba(77, 208, 225, 0));
  }

  .page-faq .faq-chapter--amber::before {
    background: linear-gradient(180deg, var(--amber), rgba(255, 179, 0, 0));
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-cover__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .75fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-step,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-toc .toc__link {
    transition: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-toc .toc__link:hover {
    transform: none;
  }
}