.page-faq {
  --faq-step-index-w: 3.2rem;
  --faq-step-pad: 20px;
  --faq-step-gap: 14px;
  --faq-line: rgba(53, 214, 224, 0.2);
  --faq-line-strong: rgba(127, 231, 238, 0.55);
  --faq-text: rgba(243, 237, 226, 0.86);
  --faq-text-dim: rgba(243, 237, 226, 0.6);
}

.page-faq .section {
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-faq .page-faq-crumb {
  padding-top: 26px;
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--nebula);
}

.page-faq .breadcrumb a {
  color: var(--rail-cyan);
  text-decoration: none;
  transition: color 0.35s var(--ease);
}

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

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(30px, 5vw, 62px);
  padding-bottom: clamp(36px, 5vw, 72px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% -6% auto -6%;
  height: 120%;
  background:
    radial-gradient(circle at 84% 14%, rgba(53, 214, 224, 0.16), transparent 46%),
    radial-gradient(circle at 8% 92%, rgba(232, 180, 74, 0.1), transparent 44%);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 52px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 4.6vw, 3.35rem);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--paper);
  margin: 12px 0 20px;
  max-width: 20ch;
}

.page-faq .faq-hero .lead {
  max-width: 46ch;
  color: var(--faq-text);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero-side {
  border-top: 1px solid var(--line-mid);
  padding-top: 20px;
}

.page-faq .faq-hero-side .meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--star-gold);
  margin: 0 0 18px;
}

.page-faq .faq-hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-hero-facts li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding-left: 18px;
  position: relative;
}

.page-faq .faq-hero-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--rail-cyan);
  box-shadow: 0 0 0 3px rgba(53, 214, 224, 0.14);
}

.page-faq .faq-fact-k {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--nebula);
}

.page-faq .faq-fact-v {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--paper);
}

/* ---------- 章节标题 ---------- */
.page-faq .faq-sec-head {
  max-width: 60ch;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-faq .faq-sec-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.32;
  color: var(--paper);
  margin: 10px 0 14px;
}

.page-faq .faq-sec-head .lead {
  color: var(--faq-text);
  max-width: 52ch;
}

/* ---------- 动手之前 ---------- */
.page-faq .faq-prereq {
  padding-bottom: clamp(36px, 5vw, 70px);
}

.page-faq .faq-prereq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-check {
  padding: clamp(22px, 3vw, 34px);
  color: var(--ink-text);
}

.page-faq .faq-check h3 {
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  line-height: 1.42;
  margin: 0 0 12px;
  color: var(--ink-text);
}

.page-faq .faq-check p {
  margin: 0 0 16px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(20, 24, 31, 0.82);
}

.page-faq .faq-check .link-inline {
  color: #0d5f68;
  border-bottom: 1px solid rgba(13, 95, 104, 0.4);
  text-decoration: none;
}

.page-faq .faq-check-criterion {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(20, 24, 31, 0.2);
  font-size: 0.875rem;
  line-height: 1.78;
  color: rgba(20, 24, 31, 0.86);
}

.page-faq .faq-check-mark {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 0.5em;
  background: var(--star-gold);
  transform: rotate(45deg);
}

/* ---------- 步骤轨道 ---------- */
.page-faq .faq-steps {
  padding-bottom: clamp(40px, 5vw, 76px);
}

.page-faq .faq-steps-visual {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

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

.page-faq .faq-step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  position: relative;
}

.page-faq .faq-step-list::before {
  content: "";
  position: absolute;
  left: calc(var(--faq-step-pad) + var(--faq-step-index-w) / 2);
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--faq-line) 12%, var(--faq-line) 88%, transparent);
  pointer-events: none;
}

.page-faq .faq-step {
  position: relative;
  background: linear-gradient(180deg, rgba(16, 26, 51, 0.86), rgba(7, 11, 24, 0.62));
  border: 1px solid var(--line-soft);
  transition: border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
}

.page-faq .faq-step[data-open="true"] {
  border-color: var(--faq-line-strong);
  box-shadow: 0 0 0 1px rgba(127, 231, 238, 0.14), 0 22px 52px -32px rgba(53, 214, 224, 0.7);
}

.page-faq .faq-step-heading,
.page-faq .faq-q-heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-step-trigger {
  display: grid;
  grid-template-columns: var(--faq-step-index-w) minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--faq-step-gap);
  width: 100%;
  padding: 18px var(--faq-step-pad);
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.page-faq .faq-step-trigger:focus-visible {
  outline: 2px solid var(--cyan-bright);
  outline-offset: -2px;
}

.page-faq .faq-step-index {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--rail-cyan);
  position: relative;
  z-index: 1;
  transition: color 0.4s var(--ease);
}

.page-faq .faq-step-index::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 9px;
  height: 9px;
  margin: -4.5px 0 0 -4.5px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 1px solid var(--line-mid);
  z-index: -1;
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.page-faq .faq-step[data-open="true"] .faq-step-index {
  color: var(--star-gold);
}

.page-faq .faq-step[data-open="true"] .faq-step-index::after {
  border-color: var(--gold-line);
  box-shadow: 0 0 0 4px rgba(232, 180, 74, 0.16);
}

.page-faq .faq-step-name {
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 1.7vw, 1.24rem);
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .faq-step-hint {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--nebula);
  white-space: nowrap;
}

.page-faq .acc-mark {
  position: relative;
  flex: none;
  width: 15px;
  height: 15px;
  justify-self: end;
}

.page-faq .acc-mark::before,
.page-faq .acc-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--rail-cyan);
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease), background 0.35s var(--ease);
}

.page-faq .acc-mark::before {
  width: 15px;
  height: 1.5px;
}

.page-faq .acc-mark::after {
  width: 1.5px;
  height: 15px;
}

.page-faq .faq-step[data-open="true"] .acc-mark::before,
.page-faq .faq-q[data-open="true"] .faq-q-mark::before {
  background: var(--star-gold);
}

.page-faq .faq-step[data-open="true"] .acc-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-step .acc-panel-inner {
  padding: 0 var(--faq-step-pad) 22px;
  display: grid;
  gap: 16px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--faq-text);
}

.page-faq .faq-step .acc-panel-inner > p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-step-meta {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-step-meta > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding-top: 10px;
  border-top: 1px dashed rgba(53, 214, 224, 0.16);
}

.page-faq .faq-step-meta dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--nebula);
}

.page-faq .faq-step-meta dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--faq-text);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-answers {
  padding-top: clamp(40px, 5vw, 72px);
  padding-bottom: clamp(40px, 5vw, 72px);
  background:
    linear-gradient(180deg, rgba(16, 26, 51, 0.35), rgba(7, 11, 24, 0) 42%),
    radial-gradient(circle at 92% 6%, rgba(53, 214, 224, 0.1), transparent 38%);
}

.page-faq .faq-sec-head--split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-answers-visual {
  margin: 0;
  align-self: end;
}

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

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(26px, 3vw, 40px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-filter .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--nebula);
}

.page-faq .faq-group {
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 2px solid var(--star-gold);
}

.page-faq .faq-group-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--star-gold);
}

.page-faq .faq-group-head h3 {
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2vw, 1.5rem);
  line-height: 1.4;
  color: var(--paper);
  margin: 0;
}

.page-faq .faq-q-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-q {
  border-left: 2px solid transparent;
  background: linear-gradient(90deg, rgba(16, 26, 51, 0.72), rgba(7, 11, 24, 0.3));
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}

.page-faq .faq-q[data-open="true"] {
  border-left-color: var(--star-gold);
  background: linear-gradient(90deg, rgba(16, 26, 51, 0.96), rgba(7, 11, 24, 0.5));
}

.page-faq .faq-q-trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  cursor: pointer;
  color: var(--paper);
}

.page-faq .faq-q-trigger:focus-visible {
  outline: 2px solid var(--cyan-bright);
  outline-offset: -2px;
}

.page-faq .faq-q-text {
  font-size: 0.9688rem;
  line-height: 1.72;
}

.page-faq .faq-q-mark {
  position: relative;
  width: 13px;
  height: 13px;
  flex: none;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--rail-cyan);
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease), background 0.35s var(--ease);
}

.page-faq .faq-q-mark::before {
  width: 13px;
  height: 1.5px;
}

.page-faq .faq-q-mark::after {
  width: 1.5px;
  height: 13px;
}

.page-faq .faq-q[data-open="true"] .faq-q-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-q .acc-panel-inner {
  padding: 0 18px 18px;
  font-size: 0.9375rem;
  line-height: 1.88;
  color: var(--faq-text);
}

.page-faq .faq-q .acc-panel-inner p {
  margin: 0;
  max-width: 64ch;
}

.page-faq .faq-q .link-inline {
  color: var(--cyan-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .faq-q .link-inline:hover,
.page-faq .faq-q .link-inline:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-line);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-contact {
  padding-bottom: clamp(48px, 6vw, 86px);
}

.page-faq .faq-contact-panel {
  padding: clamp(24px, 4vw, 48px);
  color: var(--ink-text);
}

.page-faq .faq-contact-eyebrow {
  color: #8a6a17;
  margin: 0 0 8px;
}

.page-faq .faq-contact-panel h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  line-height: 1.36;
  color: var(--ink-text);
  margin: 0 0 14px;
  max-width: 26ch;
}

.page-faq .faq-contact-lead {
  margin: 0;
  max-width: 66ch;
  font-size: 0.9375rem;
  line-height: 1.88;
  color: rgba(20, 24, 31, 0.8);
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(20, 24, 31, 0.16);
}

.page-faq .faq-contact-item {
  display: grid;
  gap: 8px;
  align-content: start;
  justify-items: start;
}

.page-faq .faq-contact-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #6b7791;
}

.page-faq .faq-contact-value {
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--ink-text);
  word-break: break-word;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-fact-v {
    font-size: 1rem;
  }

  .page-faq .faq-step-meta > div {
    grid-template-columns: 6rem minmax(0, 1fr);
    gap: 14px;
  }

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

@media (min-width: 820px) {
  .page-faq .faq-prereq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .faq-step-hint {
    display: inline-block;
  }

  .page-faq .faq-step .acc-panel-inner {
    padding-left: calc(var(--faq-step-pad) + var(--faq-step-index-w) + var(--faq-step-gap));
  }

  .page-faq .faq-q-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-hero-side {
    padding-bottom: 6px;
  }

  .page-faq .faq-sec-head--split {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.85fr);
    align-items: end;
    gap: clamp(32px, 4vw, 60px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-step-hint {
    margin-right: 8px;
  }

  .page-faq .faq-step-trigger {
    grid-template-columns: var(--faq-step-index-w) minmax(0, 1fr) auto auto;
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-faq .faq-step:hover,
  .page-faq .faq-q:hover {
    border-color: var(--line-mid);
  }

  .page-faq .faq-step[data-open="true"]:hover {
    border-color: var(--faq-line-strong);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-q,
  .page-faq .acc-mark::before,
  .page-faq .acc-mark::after,
  .page-faq .faq-q-mark::before,
  .page-faq .faq-q-mark::after,
  .page-faq .faq-step-index,
  .page-faq .faq-step-index::after,
  .page-faq .breadcrumb a {
    transition-duration: 0.15s;
  }
}