.page-faq {
  --faq-hair: rgba(138, 148, 166, 0.26);
  --faq-hair-soft: rgba(138, 148, 166, 0.16);
  background: var(--void);
  color: var(--white);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 3.5vw, 40px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--faq-hair);
  background-image:
    linear-gradient(180deg, rgba(14, 22, 38, 0.74), rgba(7, 11, 20, 0.97)),
    repeating-linear-gradient(to right, var(--faq-hair-soft) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, var(--faq-hair-soft) 0 1px, transparent 1px 64px);
  background-position: center top;
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-title {
  margin: 10px 0 0;
  font-size: clamp(32px, 7.2vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  font-weight: 900;
  color: var(--white);
  max-width: 19ch;
  text-wrap: balance;
}

.page-faq .faq-lede {
  margin: 0;
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--signal);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.78);
  max-width: 52ch;
}

.page-faq .hero-readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--faq-hair);
  border-left: 1px solid var(--faq-hair);
}

.page-faq .readout-cell {
  display: grid;
  gap: 5px;
  padding: 12px 14px;
  border-right: 1px solid var(--faq-hair);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .readout-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--grid);
}

.page-faq .readout-val {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-hero-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--faq-hair);
  background: var(--console);
}

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

.page-faq .faq-hero-figure img {
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-faq .media-caption {
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--faq-hair);
  font-size: 12px;
  line-height: 1.6;
  color: var(--grid);
}

/* ---------- 问答控制台 ---------- */
.page-faq .faq-desk {
  padding: clamp(32px, 5vw, 68px) 0;
  background: linear-gradient(180deg, var(--console) 0%, #0A1120 58%, var(--void) 100%);
}

.page-faq .desk-head {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-faq .desk-title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  font-weight: 900;
  color: var(--white);
}

.page-faq .desk-sub {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.72);
  max-width: 42ch;
}

.page-faq .desk-figure {
  margin: 0;
  border: 1px solid var(--faq-hair);
  background: var(--void);
}

.page-faq .desk-figure img {
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-faq .desk-body {
  display: grid;
  gap: clamp(16px, 3vw, 36px);
}

.page-faq .topic-rail {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-faq .faq-topics {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-faq .topic-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 12px 14px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  background: rgba(7, 11, 20, 0.55);
  color: var(--white);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.3;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

.page-faq .topic-tab:hover {
  border-color: var(--line-strong);
}

.page-faq .topic-tab:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .topic-tab[aria-selected="true"],
.page-faq .topic-tab.is-active {
  border-color: var(--signal);
  background: rgba(255, 90, 31, 0.1);
  box-shadow: inset 3px 0 0 var(--signal);
}

.page-faq .topic-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--grid);
}

.page-faq .topic-tab[aria-selected="true"] .topic-idx,
.page-faq .topic-tab.is-active .topic-idx {
  color: var(--signal);
}

.page-faq .topic-label {
  flex: 1 1 auto;
  font-weight: 700;
}

.page-faq .topic-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--grid);
}

.page-faq .desk-note {
  padding: 14px 16px;
  border: 1px solid var(--faq-hair);
  border-left: 3px solid var(--green);
  background: rgba(14, 22, 38, 0.82);
}

.page-faq .desk-note-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-faq .desk-note-val {
  margin: 6px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .desk-note-text {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--grid);
}

.page-faq .desk-note-text a {
  color: var(--signal-hot);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-panel {
  min-width: 0;
}

.page-faq .panel-heading {
  margin: 0 0 6px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 900;
  letter-spacing: 0.005em;
  color: var(--white);
}

.page-faq .panel-meta {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--grid);
}

.page-faq .faq-q-list {
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .fold > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
  transition: color 160ms ease;
}

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

.page-faq .fold > summary:hover {
  color: var(--signal-hot);
}

.page-faq .fold > summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .fold > summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--signal);
}

.page-faq .fold[open] > summary::after {
  content: "\2212";
}

.page-faq .q-idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal);
}

.page-faq .q-text {
  flex: 1 1 auto;
}

.page-faq .fold-body {
  padding: 0 0 18px;
  max-width: 70ch;
}

.page-faq .fold-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.78);
}

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

.page-faq .fold-body a {
  color: var(--signal-hot);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 联系前准备 ---------- */
.page-faq .faq-prep {
  padding: clamp(32px, 5vw, 68px) 0;
  border-top: 1px solid var(--line-strong);
  background: var(--console);
}

.page-faq .prep-grid {
  display: grid;
  gap: clamp(20px, 4vw, 48px);
}

.page-faq .section-title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.012em;
  font-weight: 900;
  color: var(--white);
}

.page-faq .section-sub {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.72);
  max-width: 42ch;
}

.page-faq .prep-foot {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--grid);
}

.page-faq .prep-foot a {
  color: var(--signal-hot);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .prep-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 15px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  background: rgba(7, 11, 20, 0.5);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-faq .prep-label:hover {
  border-color: var(--line-strong);
}

.page-faq .prep-label:has(input:checked) {
  border-color: rgba(61, 220, 132, 0.5);
  background: rgba(61, 220, 132, 0.06);
}

.page-faq .prep-label input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.page-faq .prep-label input:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .prep-label input:checked {
  border-color: var(--green);
  background: rgba(61, 220, 132, 0.18);
}

.page-faq .prep-label input:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  transform: rotate(42deg);
}

.page-faq .prep-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--grid);
}

.page-faq .prep-text {
  flex: 1 1 auto;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 238, 247, 0.86);
}

/* ---------- 服务时间 ---------- */
.page-faq .faq-hours {
  padding: clamp(32px, 5vw, 68px) 0;
}

.page-faq .hours-grid {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
}

.page-faq .faq-hours .section-title {
  color: var(--ink);
}

.page-faq .faq-hours .section-sub {
  color: rgba(28, 23, 18, 0.74);
}

.page-faq .contact-stack {
  display: grid;
  gap: 10px;
}

.page-faq .contact-card {
  padding: 14px 16px;
  border: 1px solid rgba(28, 23, 18, 0.24);
  background: rgba(255, 255, 255, 0.55);
}

.page-faq .contact-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(28, 23, 18, 0.62);
}

.page-faq .contact-val {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.8vw, 18px);
  font-weight: 700;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .hours-note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(28, 23, 18, 0.74);
}

.page-faq .hours-note a {
  color: #B33A0E;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .contact-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .hero-readout {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-faq .desk-head {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: center;
  }

  .page-faq .desk-body {
    grid-template-columns: 272px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .topic-rail {
    position: sticky;
    top: 92px;
    align-self: start;
  }

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

  .page-faq .topic-tab {
    width: 100%;
    white-space: normal;
  }

  .page-faq .prep-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-faq .hours-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .page-faq .fold-body {
    padding-left: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic-tab,
  .page-faq .fold > summary,
  .page-faq .prep-label {
    transition: none;
  }
}