.page-faq {
  color: var(--white);
  padding-block: clamp(16px, 3vw, 32px) clamp(56px, 8vw, 108px);
}

.page-faq .faq-wrap {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumb-list a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .breadcrumb-list a:hover {
  text-decoration: underline;
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-inline: 10px;
  color: var(--line);
}

.page-faq .breadcrumb-list [aria-current="page"] {
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: clamp(20px, 3.5vw, 40px);
  padding-top: clamp(24px, 4vw, 48px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: -1px auto auto 0;
  width: min(320px, 46%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 60%, transparent);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 17ch;
  font-size: clamp(32px, 7vw, 74px);
  line-height: 1.04;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--white);
  filter: drop-shadow(0 0 22px rgba(53, 242, 224, 0.18));
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 48px);
  margin-top: clamp(20px, 3.5vw, 36px);
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 0.5vw + 14px, 18px);
  line-height: 1.78;
  color: var(--white);
  opacity: 0.88;
}

.page-faq .faq-hero-stats {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-faq .faq-hero-stats > div {
  background: var(--ink-1);
  padding: 14px 16px;
}

.page-faq .faq-hero-stats dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-hero-stats dd {
  margin: 6px 0 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-hero-stats .num {
  color: var(--gold);
}

/* ---------- 区块节奏 ---------- */
.page-faq .section {
  margin-top: clamp(52px, 8vw, 104px);
}

.page-faq .section-head {
  max-width: 66ch;
}

.page-faq .section-head h2 {
  margin: 8px 0 0;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.15;
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .section-head p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 三步定位流程 ---------- */
.page-faq .step-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(22px, 3.5vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .step-block {
  position: relative;
  background: var(--ink-0);
  padding: clamp(20px, 2.6vw, 32px);
}

.page-faq .step-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
}

.page-faq .step-block:nth-child(2)::before {
  border-color: var(--violet);
}

.page-faq .step-block:nth-child(3)::before {
  border-color: var(--gold);
}

.page-faq .step-num {
  display: block;
  font-size: clamp(32px, 4.6vw, 54px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--cyan);
}

.page-faq .step-block:nth-child(2) .step-num {
  -webkit-text-stroke-color: var(--violet);
}

.page-faq .step-block:nth-child(3) .step-num {
  -webkit-text-stroke-color: var(--gold);
}

.page-faq .step-block h3 {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .step-block p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-steps-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-1);
}

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

.page-faq .faq-steps-figure figcaption {
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 层级收窄规则 ---------- */
.page-faq .narrow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.6vw, 20px);
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .narrow-card {
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-top-width: 2px;
  padding: clamp(18px, 2.4vw, 28px);
}

.page-faq .narrow-card:nth-child(1) {
  border-top-color: var(--cyan);
}

.page-faq .narrow-card:nth-child(2) {
  border-top-color: var(--violet);
}

.page-faq .narrow-card:nth-child(3) {
  border-top-color: var(--gold);
}

.page-faq .narrow-card h3 {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .narrow-card p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-hint {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
}

.page-faq .faq-hint .num {
  color: var(--gold);
  font-weight: 700;
}

/* ---------- 稳定版与版本号 ---------- */
.page-faq .version-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 44px);
  padding: clamp(20px, 3vw, 40px);
  border: 1px solid var(--line);
  background: var(--ink-1);
}

.page-faq .version-copy h2 {
  margin: 8px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.15;
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .version-copy > p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--white);
  opacity: 0.9;
  max-width: 60ch;
}

.page-faq .version-copy .muted {
  color: var(--muted);
  opacity: 1;
  font-size: 14px;
}

.page-faq .version-list {
  list-style: none;
  margin: clamp(16px, 2vw, 24px) 0 0;
  padding: 0;
  max-width: 62ch;
  border-top: 1px solid var(--line);
}

.page-faq .version-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--white);
}

.page-faq .version-list .num {
  color: var(--gold);
  font-weight: 700;
}

.page-faq .version-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-faq .version-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-0);
}

.page-faq .version-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* ---------- 问答区 ---------- */
.page-faq .faq-shell {
  margin-top: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  background: var(--ink-0);
}

.page-faq .faq-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: clamp(14px, 2vw, 22px);
  border-bottom: 1px solid var(--line);
  background: var(--ink-1);
}

.page-faq .segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  background: var(--ink-0);
}

.page-faq .segmented-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 16px;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}

.page-faq .segmented-btn:hover {
  color: var(--white);
}

.page-faq .segmented-btn[aria-selected="true"] {
  background: var(--violet);
  color: var(--white);
}

.page-faq .segmented-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.page-faq .filter-label {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .filter-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: var(--ink-0);
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
}

.page-faq .filter-input::placeholder {
  color: var(--muted);
  opacity: 0.85;
}

.page-faq .filter-input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 1px;
}

.page-faq .segment-panel[hidden] {
  display: none;
}

.page-faq .segment-panel {
  padding: clamp(4px, 1vw, 8px) clamp(16px, 2.4vw, 30px) clamp(20px, 3vw, 34px);
}

.page-faq .segment-panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-group-title {
  margin: clamp(18px, 2.6vw, 30px) 0 clamp(10px, 1.4vw, 16px);
  font-size: clamp(30px, 6vw, 62px);
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.02em;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--cyan);
}

.page-faq #panel-return .faq-group-title {
  -webkit-text-stroke-color: var(--violet);
}

.page-faq #panel-version .faq-group-title {
  -webkit-text-stroke-color: var(--gold);
}

@supports not ((-webkit-text-stroke: 1px red)) {
  .page-faq .faq-group-title {
    color: var(--cyan);
  }
  .page-faq #panel-return .faq-group-title {
    color: var(--violet);
  }
  .page-faq #panel-version .faq-group-title {
    color: var(--gold);
  }
}

.page-faq .faq-item {
  position: relative;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item > summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: clamp(14px, 2vw, 20px) clamp(36px, 4vw, 52px) clamp(14px, 2vw, 20px) 0;
  font-size: clamp(15px, 1.2vw + 13px, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
  transition: color 160ms ease;
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 160ms ease;
}

.page-faq .faq-item[open] > summary::after {
  transform: translateY(-50%) rotate(45deg);
}

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

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

.page-faq .faq-item.is-hot > summary {
  padding-left: 16px;
  box-shadow: inset 3px 0 0 var(--gold);
}

.page-faq .faq-answer {
  max-width: 66ch;
  padding: 0 0 clamp(16px, 2.4vw, 24px) 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  animation: faq-answer-in 200ms ease-out;
}

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

.page-faq .faq-item.is-hot .faq-answer {
  padding-left: 16px;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.page-faq .filter-empty {
  margin: 18px 0 6px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 问人工 ---------- */
.page-faq .faq-hand {
  border-top: 1px solid var(--line);
  padding-top: clamp(24px, 3.5vw, 44px);
}

.page-faq .hand-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 36px);
  align-items: start;
}

.page-faq .hand-copy h2 {
  margin: 8px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.15;
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .hand-copy p {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .hand-card {
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: var(--ink-1);
}

.page-faq .hand-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .hand-card p {
  margin: 10px 0 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .step-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .narrow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .step-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .narrow-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-toolbar {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .hand-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .version-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-answer {
    animation: none;
  }

  .page-faq .segmented-btn,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after {
    transition: none;
  }
}