.page-faq {
  --faq-ink: #E9F1FC;
  --faq-grad: linear-gradient(90deg, #2BE9E0 0%, #FF6A2B 100%);
  color: var(--silver);
  font-family: var(--font-body);
  padding: clamp(24px, 4vw, 56px) 0 clamp(64px, 9vw, 112px);
}

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

.page-faq .breadcrumb {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--index);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .breadcrumb a {
  color: var(--index);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan-mist);
}

.page-faq .breadcrumb span[aria-hidden] {
  margin: 0 8px;
  color: var(--line);
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  max-width: 780px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(36px, 7.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--faq-ink);
  margin: 12px 0 20px;
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--silver);
  margin: 0;
}

.page-faq .faq-hero__meta {
  margin-top: 18px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--index);
  border-left: 2px solid var(--cyan);
  padding-left: 12px;
}

/* ---- 现象定位 ---- */
.page-faq .triage {
  position: relative;
  margin-top: clamp(32px, 5.5vw, 56px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: clamp(20px, 3vw, 34px);
  overflow: hidden;
}

.page-faq .triage::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--faq-grad);
  opacity: 0.85;
}

.page-faq .triage-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 22px;
}

.page-faq .triage-kicker {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--index);
}

.page-faq .triage-figure {
  margin: 0 0 26px;
}

.page-faq .triage-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--void);
}

.page-faq .triage-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--index);
  max-width: 68ch;
}

.page-faq .triage-grid {
  display: grid;
  gap: 12px;
}

.page-faq .triage-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 20px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .triage-card:hover,
.page-faq .triage-card:focus-visible {
  border-color: var(--cyan);
  background: #16233A;
  transform: translateY(-3px);
}

.page-faq .triage-card:focus-visible {
  outline: 2px solid var(--cyan-mist);
  outline-offset: 2px;
}

.page-faq .triage-tag {
  align-self: flex-start;
}

.page-faq .triage-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--faq-ink);
  margin: 0;
}

.page-faq .triage-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--index);
}

.page-faq .triage-cta {
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .triage-cta::after {
  content: " →";
}

/* ---- 主体骨架 ---- */
.page-faq .faq-shell {
  margin-top: clamp(36px, 6vw, 68px);
  display: grid;
  gap: 26px;
}

.page-faq .faq-index__title {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--index);
  font-weight: 500;
  margin: 0 0 12px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--silver);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-index__link .num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-mist);
  border-color: var(--cyan);
  background: rgba(43, 233, 224, 0.06);
}

/* ---- 手风琴 ---- */
.page-faq .issue {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-bottom: 14px;
  overflow: hidden;
  scroll-margin-top: 92px;
  transition: border-color var(--t) var(--ease);
}

.page-faq .issue[open] {
  border-color: #2A3A55;
}

.page-faq .issue:target {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(43, 233, 224, 0.3);
}

.page-faq .issue__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast) var(--ease);
}

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

.page-faq .issue__summary:hover {
  background: rgba(43, 233, 224, 0.04);
}

.page-faq .issue__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .issue[open] .issue__summary::after {
  content: "−";
  color: var(--lava);
}

.page-faq .issue__summary:focus-visible {
  outline: 2px solid var(--cyan-mist);
  outline-offset: -2px;
}

.page-faq .issue__num {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--index);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 4px 7px;
  background: var(--void);
}

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

.page-faq .issue__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--faq-ink);
  margin: 0;
}

.page-faq .issue__meta {
  display: block;
  margin-top: 5px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--index);
}

.page-faq .issue__body {
  padding: 0 18px 22px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-faq .issue__intro {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
  max-width: 68ch;
}

.page-faq .issue__intro a {
  color: var(--cyan-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 243, 238, 0.4);
}

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

.page-faq .issue-figure {
  margin: 20px 0 4px;
  max-width: 620px;
}

.page-faq .issue-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--void);
}

.page-faq .issue-figure figcaption {
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--index);
}

/* ---- 步骤 ---- */
.page-faq .steps {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-faq .step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
}

.page-faq .step + .step {
  border-top: 1px solid var(--line);
}

.page-faq .step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.page-faq .step__body h3 {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--faq-ink);
  margin: 0 0 6px;
}

.page-faq .step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--index);
  max-width: 66ch;
}

/* ---- 联系面板 ---- */
.page-faq .contact-panel {
  scroll-margin-top: 92px;
  border-radius: 6px;
}

.page-faq .panel-body {
  padding-top: 4px;
}

.page-faq .contact-panel .prose {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 68ch;
}

.page-faq .contact-grid {
  display: grid;
  gap: 12px;
}

.page-faq .contact-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 9px;
  padding: 16px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.page-faq .contact-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--index);
}

.page-faq .contact-value {
  font-size: 15px;
  line-height: 1.5;
  color: var(--faq-ink);
  word-break: break-word;
}

.page-faq .contact-note {
  font-size: 12px;
  color: var(--index);
}

.page-faq .contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

/* ---- 响应式 ---- */
@media (min-width: 700px) {
  .page-faq .triage-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 40px;
  }

  .page-faq .faq-index__list {
    gap: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-index__link {
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    background: transparent;
    padding: 11px 14px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: rgba(43, 233, 224, 0.06);
    border-left-color: var(--cyan);
    border-radius: 0 4px 4px 0;
  }

  .page-faq .issue__summary {
    padding: 22px 26px;
  }

  .page-faq .issue__body {
    padding: 24px 26px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .triage-card,
  .page-faq .faq-index__link,
  .page-faq .issue,
  .page-faq .issue__summary {
    transition: none;
  }

  .page-faq .triage-card:hover {
    transform: none;
  }
}