.page-faq {
  --faq-hair: rgba(11, 22, 34, .14);
  --faq-hair-dark: rgba(154, 166, 178, .26);
  --faq-rule: rgba(154, 166, 178, .18);
  background: var(--paper-100);
  color: var(--ink-980);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: clip;
}

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

.page-faq img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

.faq-shell {
  max-width: 1380px;
  margin: 0 auto;
  padding: clamp(18px, 3vw, 40px) clamp(16px, 4vw, 56px) clamp(40px, 6vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  display: flex;
  align-items: center;
  gap: .55em;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--silver-600);
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-faq .faq-crumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}

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

/* ---------- 首屏框景 ---------- */
.faq-hero {
  position: relative;
  background: var(--ink-980);
  color: var(--paper-100);
  border: 1px solid var(--faq-hair-dark);
  padding: clamp(22px, 3.6vw, 54px);
  margin-bottom: clamp(24px, 3.6vw, 44px);
  overflow: hidden;
}

.faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(154, 166, 178, .13) 0 1px, transparent 1px 56px);
  opacity: .55;
  pointer-events: none;
}

.faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42%;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(56, 225, 206, .5));
  pointer-events: none;
}

.faq-hero > * {
  position: relative;
  z-index: 1;
}

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

.faq-hero__lead h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6.2vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 14px 0 16px;
  max-width: 15ch;
  color: var(--paper-100);
}

.faq-hero__intro {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(.95rem, 1.5vw, 1.05rem);
  line-height: 1.8;
  color: rgba(244, 238, 227, .8);
}

.faq-hero__media {
  margin: 0;
  border: 1px solid var(--faq-hair-dark);
  background: var(--ink-800);
}

.faq-hero__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.faq-hero__media .media__caption {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--silver-400);
  padding: 9px 12px;
  border-top: 1px solid var(--faq-hair-dark);
}

/* ---------- 三步流程 ---------- */
.faq-steps {
  list-style: none;
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--orange);
}

.faq-step {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--faq-hair-dark);
}

.faq-step:last-child {
  border-bottom: none;
  padding-bottom: 4px;
}

.faq-step__no {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--orange);
  margin-bottom: 8px;
}

.faq-step h2 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.005em;
  line-height: 1.5;
  margin: 0 0 6px;
  color: var(--paper-100);
}

.faq-step p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--silver-400);
}

.faq-step p .mono {
  color: var(--cyan);
}

/* ---------- 章节索引条 ---------- */
.faq-index {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 52px);
  padding: 0;
  border-top: 1px solid var(--faq-hair);
  border-bottom: 1px solid var(--faq-hair);
}

.faq-index li {
  flex: 1 1 auto;
}

.faq-index a {
  display: block;
  padding: 11px 14px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-980);
  text-decoration: none;
  border-right: 1px solid var(--faq-hair);
  white-space: nowrap;
  transition: background .15s ease, color .15s ease;
}

.faq-index li:last-child a {
  border-right: none;
}

.faq-index a .mono {
  color: var(--orange);
  font-size: .74rem;
  letter-spacing: .1em;
  margin-right: .6em;
  transition: color .15s ease;
}

.faq-index a:hover {
  background: var(--paper-200);
}

.faq-index a[aria-current="true"] {
  background: var(--ink-980);
  color: var(--paper-100);
}

.faq-index a[aria-current="true"] .mono {
  color: var(--cyan);
}

/* ---------- 通用章节头 ---------- */
.faq-section {
  margin-bottom: clamp(38px, 6vw, 80px);
}

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

.faq-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  border-top: 2px solid var(--ink-980);
  padding-top: 16px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.faq-head__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--orange);
}

.faq-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  margin: 0;
  max-width: 20ch;
}

.faq-head__lede {
  margin: 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-800);
}

.page-faq a.faq-link {
  color: var(--ink-980);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  transition: color .15s ease, border-color .15s ease;
}

.page-faq a.faq-link:hover {
  color: var(--orange);
  border-bottom-color: var(--ink-980);
}

/* ---------- 覆盖与边界 ---------- */
.faq-range {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
}

.faq-cases {
  list-style: none;
  margin: 0;
  padding: 0;
}

.faq-cases li {
  position: relative;
  padding: 15px 0 15px 42px;
  border-bottom: 1px solid var(--faq-hair);
}

.faq-cases li:first-child {
  border-top: 1px solid var(--faq-hair);
}

.faq-cases__k {
  position: absolute;
  left: 0;
  top: 17px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--orange);
}

.faq-cases h3 {
  margin: 0 0 5px;
  font-family: var(--font-sans);
  font-size: .98rem;
  font-weight: 700;
  letter-spacing: -.005em;
  line-height: 1.55;
}

.faq-cases p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.78;
  color: var(--ink-800);
}

.faq-map__fig {
  margin: 0;
}

.faq-map {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--faq-hair-dark);
  background: var(--ink-980);
}

.faq-map text {
  font-family: var(--font-mono);
  fill: var(--silver-400);
  letter-spacing: .04em;
}

.faq-map__fig figcaption {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: .72rem;
  line-height: 1.65;
  letter-spacing: .02em;
  color: var(--silver-600);
}

/* ---------- 工单五阶段 ---------- */
.faq-ticket__intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 36px);
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.faq-ticket__media {
  margin: 0;
  border: 1px solid var(--faq-hair);
  background: var(--paper-200);
}

.faq-ticket__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.faq-ticket__note p {
  margin: 0 0 14px;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ink-800);
  max-width: 46ch;
}

.faq-ticket__note ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.faq-ticket__note li {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--ink-800);
  background: var(--paper-200);
  border: 1px solid var(--faq-hair);
  padding: 4px 9px;
}

.faq-stage {
  margin-top: clamp(22px, 3.2vw, 36px);
}

.faq-stage__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  padding-bottom: 8px;
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--ink-980);
}

.faq-stage__title .mono {
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--orange);
}

.faq-stage__title::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--faq-hair);
}

.faq-qa {
  border-top: 1px solid var(--faq-hair);
}

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

.qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  list-style: none;
  cursor: pointer;
  padding: 15px 12px;
  font-size: .96rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink-980);
  transition: background .15s ease;
}

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

.qa__q::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: .48em;
  border-right: 1.5px solid var(--orange);
  border-bottom: 1.5px solid var(--orange);
  transform: rotate(45deg);
  transition: transform .18s ease;
}

.qa[open] > .qa__q::before {
  transform: rotate(-135deg);
}

.qa__q:hover {
  background: var(--paper-200);
}

.qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.qa__a {
  padding: 0 12px 18px 32px;
  max-width: 62ch;
}

.qa__a p {
  margin: 0 0 8px;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ink-800);
}

.qa__a p:last-child {
  margin-bottom: 0;
}

/* ---------- 周期与改期 ---------- */
.faq-cycle {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 44px);
}

.faq-cycle__anchor {
  border: 1px solid var(--faq-hair);
  border-left: 3px solid var(--orange);
  background: var(--paper-200);
  padding: clamp(18px, 2.6vw, 28px);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}

.faq-cycle__num {
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 9vw, 5rem);
  font-weight: 600;
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--orange);
}

.faq-cycle__unit {
  font-size: .86rem;
  letter-spacing: .04em;
  color: var(--ink-800);
}

.faq-cycle__hint {
  flex: 1 0 100%;
  margin: 10px 0 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--silver-600);
}

.faq-cycle__rules {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.faq-cycle__rules li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--faq-hair);
  font-size: .9rem;
  line-height: 1.78;
  color: var(--ink-800);
}

.faq-cycle__rules li:first-child {
  border-top: 1px solid var(--faq-hair);
}

.faq-cycle__rules .mono {
  flex: 0 0 auto;
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--orange);
}

/* ---------- 口径速查表 ---------- */
.faq-ledger {
  background: var(--ink-980);
  color: var(--paper-100);
  border: 1px solid var(--faq-hair-dark);
  padding: clamp(20px, 3.4vw, 46px);
}

.faq-ledger .faq-head {
  border-top-color: var(--orange);
}

.faq-ledger .faq-head h2 {
  color: var(--paper-100);
}

.faq-ledger .faq-head__lede {
  color: var(--silver-400);
}

.faq-ledger__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.faq-ledger__caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--silver-400);
  padding-bottom: 12px;
}

.faq-ledger table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.faq-ledger th {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-align: left;
  color: var(--silver-400);
  padding: 0 16px 10px 0;
  border-bottom: 1px solid var(--faq-hair-dark);
}

.faq-ledger tbody th {
  font-size: .86rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--paper-100);
  padding: 13px 16px 13px 0;
  border-bottom: 1px solid var(--faq-rule);
  vertical-align: top;
}

.faq-ledger td {
  padding: 13px 16px 13px 0;
  font-size: .86rem;
  line-height: 1.7;
  color: rgba(244, 238, 227, .82);
  border-bottom: 1px solid var(--faq-rule);
  vertical-align: top;
}

.faq-ledger tbody tr {
  transition: background .15s ease;
}

.faq-ledger tbody tr:hover {
  background: rgba(56, 225, 206, .09);
}

.faq-ledger .faq-val {
  color: var(--orange);
  font-weight: 600;
}

.faq-ledger .faq-ver {
  color: rgba(154, 166, 178, .7);
  transition: color .15s ease;
}

.faq-ledger tbody tr:hover .faq-ver {
  color: var(--cyan);
}

.faq-ledger__note {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 62ch;
  font-size: .8rem;
  line-height: 1.8;
  color: var(--silver-400);
}

.faq-ledger__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 206, .4);
  transition: border-color .15s ease;
}

.faq-ledger__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 820px) {
  .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .faq-step {
    padding: 20px 22px 18px;
    border-bottom: none;
  }

  .faq-step + .faq-step {
    border-left: 1px solid var(--faq-hair-dark);
  }

  .faq-step:first-child {
    padding-left: 0;
  }

  .faq-step:last-child {
    padding-bottom: 18px;
  }
}

@media (min-width: 900px) {
  .faq-hero__frame {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .faq-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 64px);
    align-items: end;
  }

  .faq-head__no {
    grid-column: 1 / -1;
  }

  .faq-head h2 {
    grid-column: 1;
  }

  .faq-head__lede {
    grid-column: 2;
    padding-bottom: .3em;
  }

  .faq-range {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .faq-ticket__intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .faq-cycle {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    column-gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

@media (max-width: 520px) {
  .faq-index a {
    padding: 10px 11px;
    font-size: .78rem;
  }

  .qa__a {
    padding-left: 20px;
  }

  .faq-cases li {
    padding-left: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }
}