.page-faq {
  --faq-line: rgba(0, 229, 255, .28);
  --faq-ink-soft: rgba(244, 248, 251, .78);
  --faq-on-dark: rgba(244, 248, 251, .62);
}

/* ---------- 顶部横幅 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: var(--deep-sea-800);
  color: var(--foam-050);
  padding-block: clamp(28px, 4.6vw, 64px) clamp(44px, 6vw, 88px);
}

.page-faq .faq-hero__img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  filter: saturate(.35) contrast(1.12) brightness(.9);
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(102deg, rgba(6, 26, 46, .96) 0%, rgba(11, 42, 74, .86) 48%, rgba(11, 42, 74, .42) 100%);
}

.page-faq .faq-hero__glow {
  position: absolute;
  z-index: 1;
  right: -12%;
  top: -34%;
  width: 52%;
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(0, 229, 255, .26), transparent 64%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
}

.page-faq .faq-crumbs .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 2.6vw, 34px);
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-faq .faq-crumbs .breadcrumbs__link {
  color: var(--faq-ink-soft);
  text-decoration: none;
  transition: color .22s var(--ease);
}

.page-faq .faq-crumbs .breadcrumbs__link:hover {
  color: var(--aurora-400);
}

.page-faq .faq-crumbs .breadcrumbs__sep {
  color: rgba(244, 248, 251, .34);
}

.page-faq .faq-crumbs .breadcrumbs__current {
  color: var(--aurora-150);
}

.page-faq .faq-eyebrow {
  margin: 0 0 14px;
  color: var(--aurora-150);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 66px);
  line-height: 1.06;
  letter-spacing: .02em;
  max-width: 16em;
}

.page-faq .faq-hero__lede {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 3vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chips .faq-chip {
  display: inline-block;
  padding: 8px 16px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--aurora-150);
  background: rgba(0, 229, 255, .08);
  border: 1px solid var(--faq-line);
  clip-path: polygon(9px 0, 100% 0, 100% 100%, 0 100%, 0 9px);
  text-decoration: none;
  transition: color .24s var(--ease), background-color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-chips .faq-chip:hover,
.page-faq .faq-chips .faq-chip:focus-visible {
  color: var(--abyss-900);
  background: var(--aurora-400);
  border-color: var(--aurora-400);
}

/* ---------- 双列折叠区 ---------- */
.page-faq .faq-body {
  background: var(--foam-050);
  padding-block: clamp(40px, 5.6vw, 88px);
}

.page-faq .faq-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 4.6vw, 68px);
}

.page-faq .faq-stack {
  display: flex;
  flex-direction: column;
  gap: clamp(32px, 4.6vw, 60px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--deep-sea-800);
}

.page-faq .faq-group__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--current-600);
  transition: color .3s var(--ease);
}

.page-faq .faq-group:target .faq-group__num {
  color: var(--coral-500);
}

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

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.32;
  letter-spacing: .01em;
  color: var(--ink-900);
}

.page-faq .faq-group__lead {
  margin: 6px 0 0;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate-500);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--mist-100);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--aurora-400), var(--current-600));
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform .34s var(--ease);
}

.page-faq .faq-item:has(.fold__head[aria-expanded="true"])::before {
  transform: scaleY(1);
}

.page-faq .faq-item__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item .fold__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  width: 100%;
  padding: 18px 6px 18px 16px;
  background: none;
  border: 0;
  font-family: var(--font-head);
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: .01em;
  color: var(--ink-900);
  text-align: left;
  cursor: pointer;
  transition: color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .faq-item .fold__head:hover {
  color: var(--current-600);
  background: rgba(27, 122, 150, .05);
}

.page-faq .faq-item .fold__head:focus-visible {
  outline: 2px solid var(--aurora-400);
  outline-offset: -3px;
}

.page-faq .faq-item__num {
  padding-top: 4px;
  font-family: var(--font-data);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--slate-500);
}

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

.page-faq .faq-item__caret {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  border-right: 2px solid var(--current-600);
  border-bottom: 2px solid var(--current-600);
  transform: rotate(45deg);
  transition: transform .3s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-item .fold__head[aria-expanded="true"] .faq-item__caret {
  transform: rotate(-135deg);
  border-color: var(--coral-500);
}

.page-faq .faq-item .fold__body {
  padding: 0 clamp(16px, 3vw, 48px) 20px clamp(38px, 4vw, 52px);
}

.page-faq .faq-item .fold__body:not([hidden]) {
  animation: faq-reveal .3s var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-item .fold__body p {
  margin: 0 0 10px;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-900);
}

.page-faq .faq-item .fold__body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item .fold__body a {
  color: var(--current-600);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 122, 150, .42);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-item .fold__body a:hover {
  color: var(--coral-500);
  border-color: var(--coral-500);
}

/* 步骤清单 */
.page-faq .faq-steps {
  margin: 12px 0 10px;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  margin-bottom: 8px;
  padding-left: 36px;
  counter-increment: faqstep;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--harbor-700);
}

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

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  padding: 1px 5px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--coral-500);
  background: rgba(255, 107, 74, .12);
}

/* 检索示意视觉 */
.page-faq .faq-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--abyss-900);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.62) contrast(1.08);
}

.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 34px solid var(--foam-050);
  border-left: 34px solid transparent;
}

.page-faq .faq-figure figcaption {
  padding: 12px 18px 14px;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-head);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--aurora-150);
}

/* ---------- 底部直达通道 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  background: var(--abyss-900);
  color: var(--foam-050);
  padding-block: clamp(46px, 6vw, 88px);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(124% 82% at 88% 0%, rgba(0, 229, 255, .18), transparent 60%);
  pointer-events: none;
}

.page-faq .faq-help__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 60px);
  align-items: end;
}

.page-faq .faq-eyebrow--light {
  color: var(--aurora-400);
}

.page-faq .faq-help__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.22;
  letter-spacing: .02em;
}

.page-faq .faq-help__lede {
  margin: 0 0 clamp(22px, 2.8vw, 32px);
  max-width: 40em;
  font-family: var(--font-body);
  font-size: clamp(14.5px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-help__ways {
  display: grid;
  gap: 14px;
}

.page-faq .faq-way {
  display: grid;
  gap: 5px;
  padding: 18px 20px;
  background: rgba(244, 248, 251, .05);
  border-left: 3px solid var(--aurora-400);
}

.page-faq .faq-way__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--aurora-400);
}

.page-faq .faq-way__value {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: clamp(15px, 1.6vw, 19px);
  letter-spacing: .01em;
  color: var(--foam-050);
  word-break: break-word;
}

.page-faq .faq-way__note {
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faq-on-dark);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__title {
    max-width: 12em;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: 1.1fr 1fr;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-columns {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (min-width: 1320px) {
  .page-faq .faq-columns {
    gap: 84px;
  }
}

@media (max-width: 420px) {
  .page-faq .faq-item .fold__head {
    grid-template-columns: 1fr auto;
    gap: 8px;
    padding-left: 12px;
  }

  .page-faq .faq-item__num {
    display: none;
  }

  .page-faq .faq-item .fold__body {
    padding-left: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item .fold__body:not([hidden]) {
    animation: none;
  }

  .page-faq .faq-item::before,
  .page-faq .faq-item__caret,
  .page-faq .faq-chips .faq-chip {
    transition: none;
  }
}