.page-faq {
  --faq-hair: rgba(143, 163, 181, 0.22);
  --faq-cyan-soft: rgba(59, 242, 228, 0.1);
  --faq-panel: rgba(12, 34, 56, 0.62);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(18px, 3vw, 30px) 0 clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--faq-hair);
  background:
    repeating-linear-gradient(180deg, rgba(59, 242, 228, 0.035) 0 1px, transparent 1px 7px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(32px, 6.6vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-silver);
}

.page-faq .faq-lead {
  margin: 0 0 24px;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 热门问题面板 */
.page-faq .faq-hot {
  padding: 20px 18px 14px;
  border: 1px solid var(--c-stand);
  border-left: 4px solid var(--c-cyan);
  border-radius: var(--r);
  background: var(--faq-panel);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-hot__title {
  margin: 0 0 12px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

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

.page-faq .faq-hot__item a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 8px;
  border-radius: 2px;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--c-silver);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-hot__item a:hover,
.page-faq .faq-hot__item a:focus-visible {
  background: var(--faq-cyan-soft);
  color: var(--c-cyan);
}

.page-faq .faq-hot__num {
  flex: none;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--c-orange);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 64px) 0;
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-rail__list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 6px;
}

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid var(--c-stand);
  border-radius: var(--r);
  background: rgba(23, 61, 92, 0.28);
  font-size: 14px;
  color: var(--c-silver);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--c-cyan);
  background: var(--faq-cyan-soft);
  transform: translateX(3px);
}

.page-faq .faq-rail__code {
  font-size: 11.5px;
  color: var(--c-orange);
}

.page-faq .faq-rail__count {
  font-size: 11.5px;
  color: var(--c-mist);
}

.page-faq .faq-rail__foot {
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--faq-hair);
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-faq .faq-link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 242, 228, 0.45);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--faq-hair);
  margin-bottom: clamp(32px, 5vw, 52px);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group__head {
  margin-bottom: 20px;
}

.page-faq .faq-group__kicker {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.page-faq .faq-group h2 {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-silver);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

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

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--c-stand);
  border-radius: var(--r);
  background: var(--c-orbit);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 9px 12px;
  border-top: 1px solid var(--c-stand);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--c-mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--c-stand);
  border-left: 4px solid transparent;
  border-radius: var(--r);
  background: rgba(23, 61, 92, 0.2);
  scroll-margin-top: 96px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--c-stand);
  border-left-color: rgba(59, 242, 228, 0.45);
}

.page-faq .qa[open] {
  border-color: var(--c-stand);
  border-left-color: var(--c-cyan);
  background: var(--faq-panel);
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--c-silver);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa__summary::marker {
  content: "";
}

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

.page-faq .qa:hover .qa__summary,
.page-faq .qa[open] .qa__summary {
  color: #FFFFFF;
}

.page-faq .qa__num {
  flex: none;
  padding-top: 3px;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--c-orange);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border: 1px solid var(--c-mist);
  border-radius: 2px;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-mist);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa__icon::before {
  width: 8px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__icon::after {
  width: 1.5px;
  height: 8px;
  transform: translate(-50%, -50%);
}

.page-faq .qa[open] .qa__icon,
.page-faq .qa:hover .qa__icon {
  border-color: var(--c-cyan);
}

.page-faq .qa[open] .qa__icon::before,
.page-faq .qa[open] .qa__icon::after,
.page-faq .qa:hover .qa__icon::before,
.page-faq .qa:hover .qa__icon::after {
  background: var(--c-cyan);
}

.page-faq .qa[open] .qa__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__body {
  padding: 2px 14px 16px;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--c-silver);
  opacity: 0.86;
}

.page-faq .qa__body > *:last-child {
  margin-bottom: 0;
}

.page-faq .qa__steps {
  counter-reset: qa-step;
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .qa__steps li {
  counter-increment: qa-step;
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-silver);
  opacity: 0.86;
}

.page-faq .qa__steps li::before {
  content: counter(qa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  color: var(--c-cyan);
}

/* ---------- 联系卡 ---------- */
.page-faq .faq-contact-wrap {
  padding: 0 0 clamp(40px, 6vw, 80px);
}

.page-faq .faq-contact {
  padding: clamp(22px, 4vw, 40px);
  border: 2px solid var(--c-void);
  border-radius: var(--r);
  background: var(--c-paper);
  box-shadow: 8px 8px 0 rgba(59, 242, 228, 0.28);
  color: var(--c-space);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-contact__kicker {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #B04A12;
}

.page-faq .faq-contact h2 {
  margin: 0 0 12px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--c-space);
}

.page-faq .faq-contact__copy p {
  margin: 0 0 20px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.78;
  color: #173D5C;
}

.page-faq .faq-contact__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 3px;
  padding: 11px 0;
  border-top: 1px solid rgba(6, 17, 31, 0.16);
}

.page-faq .faq-contact__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-contact__term {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #173D5C;
}

.page-faq .faq-contact__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-space);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact .faq-link {
  color: #0B5E5A;
  border-bottom-color: rgba(11, 94, 90, 0.5);
}

.page-faq .faq-contact__note {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(6, 17, 31, 0.22);
  font-size: 13px;
  line-height: 1.7;
  color: #173D5C;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .qa__summary {
    padding: 16px 18px;
  }

  .page-faq .qa__body {
    padding: 2px 18px 18px 54px;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-group__grid--fig-left {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 30px;
    align-items: start;
  }

  .page-faq .faq-group__grid--fig-right {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 30px;
    align-items: start;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

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