.page-faq {
  --faq-hair: rgba(28, 36, 48, 0.1);
  --faq-cut: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  --faq-cut-sm: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
  background: var(--snow);
  color: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 52px) 0 clamp(30px, 5vw, 56px);
  background: var(--grad-band);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(135deg, rgba(11, 62, 111, 0.05) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: clamp(16px, 3vw, 30px);
}

.page-faq .faq-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--red-700);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 13em;
}

.page-faq .faq-hero__mark {
  display: inline-block;
  padding: 0 0.06em;
  background: linear-gradient(180deg, transparent 60%, rgba(232, 181, 74, 0.6) 60%);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-500);
}

.page-faq .faq-hero__quick {
  align-self: start;
  padding: 18px 20px 20px;
  background: rgba(253, 253, 251, 0.82);
  border: 1px solid rgba(11, 62, 111, 0.14);
  clip-path: var(--faq-cut);
}

.page-faq .faq-hero__quick-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--red-700);
}

.page-faq .faq-hero__quick ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-hero__quick li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-900);
}

.page-faq .faq-quick__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--sky-900);
  background: var(--sky-100);
  padding: 2px 5px;
  clip-path: var(--faq-cut-sm);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
    gap: 44px;
  }
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 30px;
  padding-top: clamp(28px, 4vw, 44px);
  padding-bottom: clamp(56px, 8vw, 88px);
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index {
  border-top: 2px solid var(--ink-900);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-500);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 12px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-900);
  font-size: 14px;
  line-height: 1.4;
  background: rgba(230, 242, 255, 0.55);
  border-left: 2px solid transparent;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--sky-100);
  border-left-color: var(--sky-500);
  color: var(--sky-900);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--red-500);
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

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

  .page-faq .faq-index__link {
    background: transparent;
    padding: 9px 0 9px 12px;
    font-size: 15px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: transparent;
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 72px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  padding: 0 0 16px;
  border-bottom: 1px solid var(--ink-900);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  padding-top: 0.55em;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--red-500);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 4vw, 34px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__deck {
  grid-column: 2;
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-500);
}

.page-faq .faq-group:target .faq-group__head {
  border-bottom-color: var(--red-500);
}

/* ---------- 配图 ---------- */
.page-faq .faq-media {
  margin: 24px 0 6px;
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 0;
  clip-path: var(--faq-cut);
  background: var(--sky-100);
}

.page-faq .faq-media__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink-500);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  margin-top: 4px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-item {
  position: relative;
  border-top: 1px solid var(--faq-hair);
  padding-left: 16px;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--red-500);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item summary {
  position: relative;
  display: block;
  padding: 17px 42px 17px 0;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink-900);
  list-style: none;
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 11px;
  height: 11px;
  margin-top: -8px;
  border-right: 2px solid var(--sky-900);
  border-bottom: 2px solid var(--sky-900);
  transform: rotate(45deg);
  transition: transform 0.18s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(-135deg);
  margin-top: -3px;
}

.page-faq .faq-item summary:hover {
  color: var(--sky-900);
}

.page-faq .faq-item__answer {
  padding: 0 42px 20px 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-900);
}

.page-faq .faq-item__answer p {
  margin: 0 0 0.85em;
}

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

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: step;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  counter-increment: step;
  position: relative;
  padding-left: 42px;
  min-height: 26px;
  font-size: 14.5px;
  line-height: 26px;
  color: var(--ink-900);
}

.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 26px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 26px;
  color: var(--sky-900);
  background: var(--sky-100);
  clip-path: var(--faq-cut-sm);
}

/* ---------- 分组提示牌 ---------- */
.page-faq .faq-tip {
  margin-top: 24px;
  padding: 16px 18px 17px;
  background: var(--sky-100);
  clip-path: var(--faq-cut);
}

.page-faq .faq-tip__tag {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--red-700);
}

.page-faq .faq-tip p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--sky-900);
}

/* ---------- 收尾联系区 ---------- */
.page-faq .faq-outro {
  margin-top: clamp(48px, 7vw, 80px);
  display: grid;
  background: var(--grad-band);
  border-top: 2px solid var(--ink-900);
  clip-path: var(--faq-cut);
  overflow: hidden;
}

.page-faq .faq-outro__media {
  margin: 0;
  line-height: 0;
}

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

.page-faq .faq-outro__body {
  padding: clamp(22px, 4vw, 36px);
}

.page-faq .faq-outro__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--red-700);
}

.page-faq .faq-outro h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-outro p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-500);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

@media (min-width: 860px) {
  .page-faq .faq-outro {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: stretch;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 520px) {
  .page-faq .faq-item {
    padding-left: 13px;
  }

  .page-faq .faq-item summary {
    font-size: 15.5px;
    padding-right: 34px;
  }

  .page-faq .faq-item__answer {
    padding-right: 10px;
    font-size: 15px;
  }

  .page-faq .faq-steps li {
    padding-left: 38px;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-item summary::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}