.page-faq {
  --faq-sticky-top: 104px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(47, 211, 255, .16) 0%, rgba(11, 27, 51, 0) 58%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  color: var(--white);
  padding-top: clamp(104px, 15vw, 168px);
  padding-bottom: clamp(44px, 7vw, 84px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(198, 255, 60, .5), transparent);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
}

.page-faq .faq-hero-copy .breadcrumb {
  margin-bottom: 14px;
  color: rgba(255, 255, 255, .6);
}

.page-faq .faq-hero-copy .breadcrumb a {
  color: rgba(255, 255, 255, .78);
  text-decoration: none;
}

.page-faq .faq-hero-copy .breadcrumb a:hover {
  color: var(--lime);
}

.page-faq .faq-hero .eyebrow {
  color: var(--lime);
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-size: var(--fs-4xl);
  line-height: 1.04;
  letter-spacing: -.03em;
  font-weight: 800;
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin-top: 18px;
  max-width: 60ch;
  color: rgba(255, 255, 255, .8);
  line-height: 1.8;
}

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

.page-faq .faq-hero-media {
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius-l);
  overflow: hidden;
  box-shadow: var(--shadow-dark);
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 26px;
}

.page-faq .faq-index {
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: var(--white);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow-card);
}

.page-faq .faq-index-title {
  margin: 0 0 10px;
  font-size: var(--fs-xs);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--graphite);
  font-weight: 700;
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 2px 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  background: var(--paper-100);
  color: var(--ink-900);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-index-link .faq-count {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--graphite);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--white);
  outline: none;
}

.page-faq .faq-index-link:hover .faq-count,
.page-faq .faq-index-link:focus-visible .faq-count {
  color: var(--lime);
}

.page-faq .faq-index-note {
  margin: 8px 0 0;
  font-size: var(--fs-xs);
  color: var(--graphite);
  line-height: 1.6;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-light);
}

.page-faq .faq-group-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--ink-900);
  color: var(--lime);
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: .06em;
}

.page-faq .faq-group-head .sec-title {
  margin: 0;
  font-size: var(--fs-2xl);
  letter-spacing: -.02em;
}

.page-faq .qa {
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-faq .qa + .qa {
  margin-top: 12px;
}

.page-faq .qa-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0;
  padding: 16px 18px;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--ink-900);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-q:hover {
  color: var(--ink-700);
}

.page-faq .qa-mark {
  position: relative;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-light);
  border-radius: 50%;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--ink-900);
  border-radius: 2px;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-faq .qa-mark::before {
  left: 5px;
  right: 5px;
  top: 9px;
  height: 2px;
}

.page-faq .qa-mark::after {
  top: 5px;
  bottom: 5px;
  left: 9px;
  width: 2px;
}

.page-faq .qa[open] .qa-mark {
  background: var(--lime);
  border-color: var(--ink-900);
}

.page-faq .qa[open] .qa-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa-a {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--line-light);
  margin-top: -1px;
  padding-top: 14px;
}

.page-faq .qa-a p {
  margin: 0;
  color: var(--ink-800);
  line-height: 1.75;
}

.page-faq .qa-a .link-line {
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

.page-faq .qa-a .link-line:hover {
  color: var(--cyan);
}

.page-faq .qa-a .num {
  color: var(--ink-900);
  font-weight: 700;
  background: rgba(198, 255, 60, .38);
  border-radius: 4px;
  padding: 0 4px;
}

.page-faq .qa .copy-btn {
  margin-top: 12px;
  padding: 7px 14px;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  background: var(--paper-100);
  color: var(--ink-900);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa .copy-btn:hover {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--white);
}

.page-faq .qa .copy-btn[data-copied="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
}

/* ---------- 联系引导 ---------- */
.page-faq .faq-help {
  scroll-margin-top: 96px;
}

.page-faq .faq-help-inner {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-help .eyebrow {
  color: var(--orange);
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-faq .faq-help .sec-title {
  margin: 10px 0 0;
  font-size: var(--fs-3xl);
  letter-spacing: -.02em;
  line-height: 1.1;
  color: var(--white);
}

.page-faq .faq-help .lede {
  margin-top: 16px;
  max-width: 62ch;
  color: rgba(255, 255, 255, .78);
  line-height: 1.8;
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(20, 41, 74, .72);
}

.page-faq .faq-contact-key {
  flex: 0 0 auto;
  font-size: var(--fs-xs);
  letter-spacing: .1em;
  color: var(--cyan);
  font-weight: 700;
}

.page-faq .faq-contact-val {
  flex: 1 1 220px;
  color: var(--white);
  font-size: var(--fs-base);
  word-break: break-word;
}

.page-faq .faq-contact-item .copy-btn {
  flex: 0 0 auto;
  padding: 7px 14px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  font-size: var(--fs-xs);
  font-weight: 700;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-contact-item .copy-btn:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
}

.page-faq .faq-contact-item .copy-btn[data-copied="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-faq .faq-help-card {
  padding: 20px;
  border-radius: var(--radius);
}

.page-faq .faq-help-card-title {
  margin: 0 0 12px;
  font-size: var(--fs-lg);
  color: var(--white);
  letter-spacing: -.01em;
}

.page-faq .faq-help-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: rgba(255, 255, 255, .8);
  line-height: 1.7;
  font-size: var(--fs-sm);
}

.page-faq .faq-help-list .link-line {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 60, .45);
}

.page-faq .faq-help-list .link-line:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-help-media {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-l);
  overflow: hidden;
  margin: 0;
}

.page-faq .faq-help-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-help-media .media-caption {
  padding: 10px 14px;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, .62);
  background: rgba(11, 27, 51, .8);
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-index-list {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .page-faq .faq-index-list > li {
    flex: 0 1 auto;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
    padding: 20px 18px;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    padding: 0;
  }

  .page-faq .faq-index-list > li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index-link {
    justify-content: space-between;
    border-radius: var(--radius-s);
    white-space: normal;
  }

  .page-faq .faq-q {
    padding: 18px 22px;
  }

  .page-faq .qa-a {
    padding: 16px 22px 20px;
  }

  .page-faq .faq-help-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .qa-mark,
  .page-faq .qa .copy-btn,
  .page-faq .faq-contact-item .copy-btn,
  .page-faq .faq-index-link {
    transition: none;
  }
}