.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 34px);
  --faq-line: 1px solid var(--line-soft);
  background: var(--deep-sea);
  color: var(--ice);
  padding-bottom: clamp(44px, 6vw, 90px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 4.6vw, 56px)) 0 clamp(34px, 5vw, 66px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(880px 420px at 10% -10%, rgba(45, 226, 230, .15), transparent 62%),
    radial-gradient(680px 420px at 98% 6%, rgba(123, 97, 255, .14), transparent 60%),
    linear-gradient(180deg, var(--char) 0%, var(--deep-sea) 100%);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .8rem;
  color: var(--mist);
  margin-bottom: 14px;
}

.page-faq .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-faq .faq-title {
  font-size: clamp(2.1rem, 5.6vw, 4.2rem);
  font-weight: 200;
  line-height: 1.08;
  letter-spacing: -.022em;
  margin: 0 0 20px;
  color: var(--ice);
  max-width: 20ch;
}

.page-faq .lead {
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.8;
  color: rgba(215, 249, 247, .82);
  margin: 0 0 26px;
  max-width: 56ch;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-faq .btn {
  text-decoration: none;
}

.page-faq .faq-hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  border-top: 1px solid var(--line-soft);
  padding-top: 20px;
}

.page-faq .faq-hero-facts li {
  display: grid;
  gap: 6px;
}

.page-faq .faq-hero-facts b {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 500;
  color: var(--flare);
  letter-spacing: .01em;
}

.page-faq .faq-hero-facts span {
  font-size: .78rem;
  color: var(--mist);
  line-height: 1.5;
}

.page-faq .faq-hero-visual {
  position: relative;
}

.page-faq .faq-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  box-shadow: 14px 14px 0 rgba(45, 226, 230, .14);
  object-fit: cover;
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(34px, 5vw, 70px);
}

.page-faq .faq-index {
  border: var(--faq-line);
  background: var(--midnight);
  padding: 18px 16px;
}

.page-faq .faq-index-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--flare);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 8px;
  color: var(--ice);
  text-decoration: none;
  font-size: .95rem;
  line-height: 1.4;
  border-left: 2px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  background: var(--cyan-a10);
  border-left-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-idx-num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .faq-index-list a:hover .faq-idx-num,
.page-faq .faq-index-list a:focus-visible .faq-idx-num {
  color: var(--cyan);
}

.page-faq .faq-index-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答分组 ---------- */

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
  padding-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 68px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--cyan);
  border: 1px solid var(--cyan-a18);
  padding: 3px 7px;
  flex: 0 0 auto;
}

.page-faq .faq-group h2 {
  margin: 0;
  font-size: clamp(1.35rem, 2.8vw, 2.05rem);
  font-weight: 200;
  letter-spacing: -.012em;
  line-height: 1.2;
  color: var(--ice);
}

.page-faq .faq-group-lead {
  margin: 12px 0 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 手风琴 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-left: 3px solid rgba(155, 176, 193, .42);
  background: linear-gradient(180deg, rgba(16, 43, 68, .92), rgba(10, 27, 42, .94));
  transition: border-color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .faq-item:hover {
  border-left-color: var(--cyan);
}

.page-faq .faq-item[open] {
  border-left-color: var(--flare);
  background: var(--midnight);
  box-shadow: 6px 6px 0 rgba(5, 17, 28, .62);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ice);
}

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

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

.page-faq .faq-qmark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--mist);
  padding-top: 3px;
}

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

.page-faq .faq-qtext {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(.98rem, 1.5vw, 1.05rem);
  font-weight: 500;
  line-height: 1.6;
  overflow-wrap: break-word;
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--cyan);
  transition: color .2s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--flare);
}

.page-faq .faq-item[open] > summary {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-item > summary .tag {
  flex: 0 0 auto;
  align-self: center;
}

.page-faq .faq-answer {
  padding: 16px 18px 20px;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(215, 249, 247, .84);
  overflow-wrap: break-word;
}

.page-faq .faq-answer > p {
  margin: 0;
}

.page-faq .faq-answer > p + p,
.page-faq .faq-answer > ol + p {
  margin-top: 12px;
}

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 38px;
  line-height: 1.7;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--flare);
  border: 1px solid rgba(255, 94, 58, .42);
  padding: 1px 5px;
  border-radius: var(--radius);
}

.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  box-shadow: 10px 10px 0 rgba(123, 97, 255, .16);
  object-fit: cover;
}

/* ---------- 联系卡片 ---------- */

.page-faq .faq-contact-card {
  margin-top: 20px;
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--flare);
  background: linear-gradient(135deg, rgba(16, 43, 68, .96), rgba(10, 27, 42, .96));
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-contact-grid {
  margin: 0;
  display: grid;
  gap: 18px 26px;
}

.page-faq .faq-contact-cell dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 7px;
}

.page-faq .faq-contact-cell dd {
  margin: 0;
  font-size: clamp(.95rem, 1.5vw, 1.05rem);
  line-height: 1.55;
  color: var(--ice);
  overflow-wrap: break-word;
}

.page-faq .faq-contact-mono {
  font-family: var(--font-mono);
  color: var(--cyan) !important;
  letter-spacing: .01em;
}

/* ---------- 收束 ---------- */

.page-faq .faq-tail {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--violet);
  background: var(--violet-a14);
}

.page-faq .faq-tail p {
  margin: 0 0 16px;
  font-size: .95rem;
  line-height: 1.75;
  color: rgba(215, 249, 247, .86);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: clamp(30px, 4vw, 62px);
  }

  .page-faq .faq-hero-visual {
    align-self: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: 262px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 64px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-faq .faq-index-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-item > summary .tag {
    display: none;
  }

  .page-faq .faq-item > summary {
    padding: 15px 14px;
    gap: 10px;
  }

  .page-faq .faq-answer {
    padding: 14px 14px 18px;
  }

  .page-faq .faq-hero-visual img {
    box-shadow: 8px 8px 0 rgba(45, 226, 230, .14);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-index-list a,
  .page-faq .breadcrumbs a {
    transition: none;
  }
}