.page-faq {
  --faq-sticky-top: calc(var(--header-h) + 10px);
  --faq-ease: 180ms cubic-bezier(.32, .7, .36, 1);
  --faq-line: rgba(44, 59, 88, .16);
  --faq-body: #3C4A63;
  background: var(--silver-050);
  color: var(--ink-900);
}

/* ------- 首屏 ------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--silver-200);
  padding-top: calc(var(--top-offset) + clamp(40px, 6vw, 84px));
  padding-bottom: clamp(64px, 9vw, 128px);
  isolation: isolate;
}

.page-faq .faq-hero-mark {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(118deg, rgba(10, 17, 32, 0) 42%, rgba(17, 27, 46, .92) 42.4%),
    repeating-linear-gradient(90deg, rgba(53, 214, 232, .07) 0 1px, transparent 1px 84px);
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--fs-index);
  letter-spacing: .12em;
  color: var(--silver-500);
}

.page-faq .breadcrumb-list li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--ink-500);
}

.page-faq .breadcrumb-list a {
  color: var(--silver-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--faq-ease), border-color var(--faq-ease);
}

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

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
}

.page-faq .faq-hero-copy .eyebrow {
  color: var(--cyan);
  letter-spacing: .18em;
}

.page-faq .faq-hero-copy .display {
  margin: 18px 0 24px;
  font-weight: 300;
  color: var(--paper);
  letter-spacing: .01em;
}

.page-faq .faq-hero-copy .lede {
  color: var(--silver-200);
  max-width: 56ch;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--ink-500);
  padding-left: 22px;
}

.page-faq .meta-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(140, 149, 168, .28);
}

.page-faq .meta-line:last-child {
  border-bottom: 0;
}

.page-faq .meta-key {
  font-size: var(--fs-index);
  letter-spacing: .12em;
  color: var(--silver-500);
}

.page-faq .meta-val {
  font-size: 1rem;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-faq .faq-hero-visual {
  position: absolute;
  right: -12%;
  bottom: -22%;
  width: min(64%, 900px);
  margin: 0;
  z-index: 1;
  opacity: .16;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(closest-side, #000 55%, transparent 100%);
  mask-image: radial-gradient(closest-side, #000 55%, transparent 100%);
}

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

/* ------- 更新节奏 ------- */
.page-faq .faq-rhythm {
  padding-top: clamp(56px, 8vw, 112px);
  padding-bottom: clamp(56px, 8vw, 112px);
  background: var(--silver-050);
}

.page-faq .faq-rhythm-note {
  color: var(--silver-500);
  max-width: 46ch;
  font-size: .94rem;
  margin: 0;
}

.page-faq .faq-rhythm-main p {
  color: var(--faq-body);
  line-height: 1.75;
  margin: 0 0 18px;
}

.page-faq .faq-rhythm-lede {
  color: var(--ink-900);
  font-size: 1.08rem;
}

.page-faq .faq-rhythm-link {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.page-faq .faq-link-sep {
  color: var(--silver-500);
}

.page-faq .faq-inline-link {
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 2px;
  transition: color var(--faq-ease), background var(--faq-ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--ink-900);
  background: var(--cyan-08);
}

.page-faq .faq-rhythm-side {
  margin-top: clamp(28px, 5vw, 0px);
  padding: 22px 22px 12px;
  border-radius: var(--radius-panel);
  background: var(--paper);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-rhythm-side .index-label {
  display: block;
  margin-bottom: 14px;
  color: var(--silver-500);
  letter-spacing: .12em;
}

.page-faq .cycle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .cycle-item {
  position: relative;
  padding: 14px 0 14px 16px;
  border-top: 1px solid var(--faq-line);
  transition: background var(--faq-ease);
}

.page-faq .cycle-item:first-child {
  border-top: 0;
}

.page-faq .cycle-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: var(--ink-500);
  border-radius: 2px;
  transition: background var(--faq-ease);
}

.page-faq .cycle-item:hover {
  background: var(--cyan-08);
}

.page-faq .cycle-item:hover::before {
  background: var(--cyan);
}

.page-faq .cycle-tag {
  display: inline-block;
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-faq .cycle-title {
  margin: 0;
  font-size: .95rem;
  line-height: 1.65;
  color: var(--ink-900);
}

/* ------- 问答分区 ------- */
.page-faq .faq-qa {
  background: var(--paper);
  padding-top: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .faq-filter {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  margin: 0 0 clamp(20px, 3vw, 36px);
  padding: 12px 0;
  background: rgba(255, 255, 255, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--faq-line);
}

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

.page-faq .faq-filter-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-pill {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--ink-500);
  color: var(--ink-900);
  font-size: .9rem;
  text-decoration: none;
  background: transparent;
  transition: background var(--faq-ease), color var(--faq-ease), border-color var(--faq-ease);
}

.page-faq .faq-pill:hover {
  background: var(--ink-800);
  border-color: var(--ink-800);
  color: var(--paper);
}

.page-faq .faq-pill:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  color: var(--ink-900);
}

.page-faq .faq-group {
  padding: clamp(30px, 4vw, 52px) 0;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--header-h) + 84px);
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-faq .faq-group-head {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--ink-900);
}

.page-faq .faq-group-index {
  font-size: .82rem;
  color: var(--gold);
  letter-spacing: .1em;
}

.page-faq .faq-group-desc {
  margin: 0;
  color: var(--silver-500);
  max-width: 56ch;
  font-size: .95rem;
}

.page-faq .faq-item {
  border-top: 1px solid var(--faq-line);
  transition: background var(--faq-ease);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  cursor: pointer;
  list-style: none;
  padding: 18px 46px 18px 20px;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink-900);
  transition: background var(--faq-ease), color var(--faq-ease), padding-left var(--faq-ease);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: transparent;
  transition: background var(--faq-ease);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--silver-500);
  transition: color var(--faq-ease);
}

.page-faq .faq-item > summary:hover {
  background: var(--cyan-08);
  padding-left: 26px;
}

.page-faq .faq-item > summary:hover::before {
  background: var(--cyan);
}

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

.page-faq .faq-item[open] > summary {
  background: var(--ink-800);
  color: var(--paper);
  padding-left: 26px;
}

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

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

.page-faq .faq-answer {
  padding: 14px 28px 20px 28px;
  border-left: 2px solid var(--cyan);
  background: rgba(17, 27, 46, .025);
  color: var(--faq-body);
  line-height: 1.75;
  font-size: .96rem;
  transition: background var(--faq-ease);
}

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

.page-faq .faq-answer p + p {
  margin-top: 8px;
}

.page-faq .faq-backtop {
  margin: clamp(24px, 4vw, 40px) 0 0;
  font-size: .9rem;
}

/* ------- 人工支持 ------- */
.page-faq .faq-support {
  background: var(--ink-900);
  color: var(--silver-200);
  padding-top: clamp(56px, 8vw, 108px);
  padding-bottom: clamp(56px, 8vw, 108px);
}

.page-faq .faq-support .index-label {
  color: var(--cyan);
  letter-spacing: .16em;
}

.page-faq .faq-support .section-title {
  color: var(--paper);
  font-weight: 300;
  margin: 14px 0 18px;
}

.page-faq .faq-support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.page-faq .faq-support-lede {
  color: var(--silver-200);
  max-width: 52ch;
}

.page-faq .channel-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .channel-item {
  position: relative;
  padding: 18px 20px 18px 24px;
  border-top: 1px solid var(--ink-500);
  transition: background var(--faq-ease);
}

.page-faq .channel-item:last-child {
  border-bottom: 1px solid var(--ink-500);
}

.page-faq .channel-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: transparent;
  border-radius: 2px;
  transition: background var(--faq-ease);
}

.page-faq .channel-item:hover {
  background: var(--mist);
}

.page-faq .channel-item:hover::before {
  background: var(--cyan);
}

.page-faq .channel-desc {
  margin: 10px 0 8px;
  color: var(--silver-200);
  font-size: .96rem;
  line-height: 1.7;
}

.page-faq .channel-meta {
  margin: 0;
  font-size: .84rem;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-faq .faq-support-foot {
  margin: 22px 0 0;
  color: var(--silver-500);
  font-size: .9rem;
  line-height: 1.7;
}

.page-faq .faq-support-visual {
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
}

.page-faq .faq-support-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-support-visual .img-caption {
  padding: 12px 18px 16px;
  font-size: .84rem;
  color: var(--silver-500);
  background: var(--ink-800);
}

/* ------- 清单外转向 ------- */
.page-faq .faq-next {
  background: var(--silver-050);
  padding-top: clamp(48px, 7vw, 96px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .faq-next-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--radius-panel);
  background: var(--paper);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-next-copy .section-title {
  font-weight: 300;
  margin: 12px 0 16px;
}

.page-faq .faq-next-desc {
  margin: 0;
  color: var(--faq-body);
  line-height: 1.75;
  max-width: 54ch;
}

.page-faq .faq-next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  align-self: start;
}

.page-faq .faq-next-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--faq-line);
  color: var(--ink-900);
  font-size: .96rem;
}

.page-faq .faq-next-list li:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-next-key {
  color: var(--gold);
  font-size: .82rem;
  letter-spacing: .1em;
}

.page-faq .faq-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ------- 响应式 ------- */
@media (min-width: 760px) {
  .page-faq .faq-support-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-next-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-faq .faq-next-actions {
    grid-column: 1 / -1;
    padding-top: 8px;
    border-top: 1px solid var(--faq-line);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-rhythm-side {
    margin-top: 0;
  }

  .page-faq .faq-next-panel {
    grid-template-columns: minmax(0, 6fr) minmax(0, 3fr) minmax(0, 3fr);
    align-items: center;
  }

  .page-faq .faq-next-actions {
    grid-column: auto;
    border-top: 0;
    padding-top: 0;
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-next-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-hero-visual {
    width: 110%;
    right: -24%;
    bottom: -28%;
    opacity: .12;
  }

  .page-faq .faq-filter {
    padding: 10px 0;
  }

  .page-faq .faq-item > summary {
    padding: 16px 42px 16px 16px;
    font-size: .96rem;
  }

  .page-faq .faq-item > summary:hover,
  .page-faq .faq-item[open] > summary {
    padding-left: 20px;
  }

  .page-faq .faq-answer {
    padding: 12px 18px 18px 20px;
  }

  .page-faq .faq-group-title {
    font-size: 1.28rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .01ms !important;
  }
}