.page-faq {
  --faq-line-cyan: 1px solid rgba(41, 230, 214, 0.18);
  --faq-line-soft: 1px solid rgba(126, 147, 166, 0.18);
  --faq-surface: linear-gradient(155deg, rgba(18, 50, 79, 0.78) 0%, rgba(6, 20, 36, 0.88) 100%);
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(56px, 8vw, 96px);
  color: var(--white);
}

.page-faq::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: min(1240px, 100%);
  height: 620px;
  transform: translateX(-50%);
  background:
    radial-gradient(50% 58% at 16% 10%, rgba(41, 230, 214, 0.15), transparent 70%),
    radial-gradient(44% 54% at 90% 22%, rgba(255, 107, 74, 0.12), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(20px, 4.5vw, 44px) 0 clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3.5vw, 34px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-faq .faq-title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 16ch;
}

.page-faq .faq-hero-copy .lead {
  max-width: 58ch;
  margin: 0;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-hero-visual {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: var(--faq-line-cyan);
  background: var(--sea-800);
  box-shadow: var(--shadow-deep);
}

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

.page-faq .faq-hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 20, 36, 0) 42%, rgba(5, 7, 10, 0.72) 100%);
  pointer-events: none;
}

.page-faq .faq-hero-cap {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 1;
  padding: 6px 13px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(41, 230, 214, 0.38);
  background: rgba(5, 7, 10, 0.74);
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-shell {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
  align-items: start;
}

.page-faq .faq-rail-label {
  display: none;
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--grey-400);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 4px 2px 12px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.page-faq .faq-rail-list li {
  flex: none;
  scroll-snap-align: start;
}

.page-faq .faq-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(126, 147, 166, 0.26);
  background: rgba(18, 50, 79, 0.56);
  color: var(--white);
  font-size: 14px;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-pill .mono {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey-400);
}

.page-faq .faq-pill:hover,
.page-faq .faq-pill:focus-visible {
  border-color: rgba(41, 230, 214, 0.62);
  background: rgba(41, 230, 214, 0.12);
  color: var(--cyan);
}

.page-faq .faq-pill:hover .mono,
.page-faq .faq-pill:focus-visible .mono {
  color: var(--cyan);
}

.page-faq .faq-rail-note {
  display: none;
}

/* ---------- 分组 ---------- */

.page-faq .faq-flow {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  min-width: 0;
}

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

.page-faq .faq-block-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(14px, 2.4vw, 22px);
  align-items: start;
  padding-bottom: 16px;
  border-bottom: var(--faq-line-cyan);
  margin-bottom: 18px;
}

.page-faq .faq-block-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 46px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(41, 230, 214, 0.6);
}

.page-faq .faq-block-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.8vw, 27px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-block-lead {
  margin: 8px 0 0;
  max-width: 56ch;
  color: var(--grey-400);
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .faq-item {
  border-radius: var(--r-md);
  border: 1px solid rgba(126, 147, 166, 0.16);
  background: var(--faq-surface);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(41, 230, 214, 0.32);
}

.page-faq .faq-item[open] {
  border-color: rgba(41, 230, 214, 0.46);
  background: linear-gradient(150deg, rgba(18, 50, 79, 0.9) 0%, rgba(6, 20, 36, 0.78) 100%);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-item[open] summary {
  color: var(--cyan);
}

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

.page-faq .faq-mark {
  position: relative;
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(41, 230, 214, 0.42);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-mark::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-mark::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-item[open] .faq-mark {
  background: rgba(41, 230, 214, 0.18);
  border-color: rgba(41, 230, 214, 0.8);
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-mark::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0.2);
}

.page-faq .faq-a {
  padding: 0 16px 16px;
  border-top: 1px dashed rgba(126, 147, 166, 0.2);
  margin-top: 0;
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  color: var(--grey-400);
  font-size: 15px;
  line-height: 1.82;
}

.page-faq .faq-a a,
.page-faq .faq-contact-text a,
.page-faq .faq-contact-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 230, 214, 0.38);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-a a:hover,
.page-faq .faq-contact-text a:hover,
.page-faq .faq-contact-note a:hover {
  color: var(--white);
  border-color: rgba(244, 248, 251, 0.5);
}

/* ---------- 两步引导 ---------- */

.page-faq .faq-panel-cta {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(18px, 3vw, 26px);
  padding: clamp(18px, 3vw, 28px);
  border-radius: var(--r-lg);
  border: var(--faq-line-cyan);
  background: linear-gradient(140deg, rgba(18, 50, 79, 0.86) 0%, rgba(5, 7, 10, 0.9) 100%);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-figure {
  position: relative;
  margin: 0 auto;
  width: 100%;
  max-width: 236px;
  border-radius: var(--r-md);
  overflow: hidden;
  border: var(--faq-line-soft);
  background: var(--sea-800);
}

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

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

.page-faq .faq-steps {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
}

.page-faq .faq-steps .mono {
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--coral);
}

.page-faq .faq-steps strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 4px;
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey-400);
}

/* ---------- 联系支持 ---------- */

.page-faq .faq-contact-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .faq-contact-card {
  padding: clamp(18px, 2.6vw, 24px);
  border-radius: var(--r-lg);
  border: var(--faq-line-cyan);
  background: linear-gradient(150deg, rgba(18, 50, 79, 0.82) 0%, rgba(6, 20, 36, 0.86) 100%);
  min-width: 0;
}

.page-faq .faq-contact-card--alt {
  border-color: rgba(255, 107, 74, 0.28);
  background: linear-gradient(150deg, rgba(255, 107, 74, 0.1) 0%, rgba(6, 20, 36, 0.9) 62%);
}

.page-faq .faq-contact-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(126, 147, 166, 0.2);
}

.page-faq .faq-contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-contact-key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--grey-400);
}

.page-faq .faq-contact-val {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-contact-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey-400);
}

.page-faq .faq-contact-text {
  margin: 16px 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--grey-400);
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-contact-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-faq .faq-contact-list li {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }

  .page-faq .faq-panel-cta {
    grid-template-columns: 224px minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-figure {
    max-width: none;
    margin: 0;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 244px minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 100px;
  }

  .page-faq .faq-rail-label {
    display: block;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 8px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-pill {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 16px;
  }

  .page-faq .faq-rail-note {
    display: block;
    margin-top: 18px;
    padding: 16px;
    border-radius: var(--r-md);
    border: var(--faq-line-soft);
    background: rgba(11, 34, 56, 0.6);
  }

  .page-faq .faq-rail-note p {
    margin: 0 0 12px;
    font-size: 13px;
    line-height: 1.7;
    color: var(--grey-400);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-item summary {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .faq-a {
    padding: 0 20px 18px;
  }
}

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