.page-faq {
  --faq-rail-gap: clamp(18px, 3vw, 34px);
  --faq-card-pad: clamp(16px, 2.4vw, 24px);
  --faq-glow-violet: rgba(139, 92, 246, 0.18);
  --faq-glow-cyan: rgba(34, 211, 238, 0.12);
  --faq-danger-line: rgba(249, 115, 22, 0.65);
  --faq-safe-line: rgba(34, 211, 238, 0.55);

  display: block;
  background:
    radial-gradient(1100px 560px at 84% -10%, var(--faq-glow-violet), transparent 62%),
    radial-gradient(820px 480px at 4% 14%, var(--faq-glow-cyan), transparent 60%),
    var(--bg-deep);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-faq p {
  margin: 0;
}

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

.page-faq a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-faint);
}

.page-faq .crumbs-list a {
  color: var(--text-dim);
}

.page-faq .crumb-sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  padding: clamp(22px, 3.5vw, 46px) 0 clamp(28px, 4.5vw, 58px);
}

.page-faq .faq-intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 7.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  max-width: 20em;
}

.page-faq .faq-lede {
  margin-top: clamp(14px, 2vw, 20px);
  max-width: 34em;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--text-dim);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(16px, 3vw, 30px);
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(14px, 2vw, 20px);
}

.page-faq .faq-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .faq-fact-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-hint {
  position: relative;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: var(--radius);
  background: var(--panel-soft);
  padding: var(--faq-card-pad);
}

.page-faq .faq-hint-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--violet);
  text-transform: uppercase;
}

.page-faq .hint-list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-faq .hint-item dt {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .hint-item dd {
  margin: 4px 0 0;
  font-size: 13.5px;
  color: var(--text-dim);
}

/* ---------- 三步指示器 ---------- */
.page-faq .step-rail {
  position: sticky;
  top: 0;
  z-index: 6;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(5, 8, 15, 0.97), rgba(10, 18, 32, 0.9));
  backdrop-filter: blur(10px);
}

.page-faq .step-rail-list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(200px, 1fr);
  margin: 0;
  padding-top: 0;
  padding-bottom: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .step-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px clamp(14px, 2.4vw, 26px);
  border-right: 1px solid var(--line-soft);
  color: var(--text);
  text-decoration: none;
  transition: background 0.2s ease;
}

.page-faq .step-node:hover,
.page-faq .step-node:focus-visible {
  background: rgba(139, 92, 246, 0.1);
  text-decoration: none;
}

.page-faq .step-idx {
  font-size: 20px;
  font-weight: 700;
  color: var(--violet);
  line-height: 1;
}

.page-faq .step-node-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .step-node-name {
  font-size: 14px;
  font-weight: 700;
}

.page-faq .step-node-time {
  font-size: 11px;
  color: var(--text-faint);
}

/* ---------- 章节通用 ---------- */
.page-faq .section {
  padding: clamp(44px, 7vw, 92px) 0;
}

.page-faq .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(22px, 3.5vw, 40px);
}

.page-faq .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .section-note {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

/* ---------- 三步卡片 ---------- */
.page-faq .steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .step-card {
  position: relative;
  background: linear-gradient(160deg, var(--panel) 0%, var(--bg-night) 100%);
  padding: var(--faq-card-pad);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .step-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  opacity: 0.5;
}

.page-faq .step-card-num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-faq .step-card-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.005em;
}

.page-faq .step-card-text {
  font-size: 14.5px;
  color: var(--text-dim);
  max-width: 30em;
}

.page-faq .step-card-meta {
  margin-top: auto;
  padding-top: 10px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

.page-faq .steps-figure {
  margin: clamp(22px, 3.5vw, 38px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-night);
}

.page-faq .steps-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-faq .media-caption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 分支区 ---------- */
.page-faq .branch-section {
  background: linear-gradient(180deg, rgba(10, 18, 32, 0.72), rgba(5, 8, 15, 0));
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: clamp(20px, 3vw, 30px);
  scrollbar-width: none;
}

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

.page-faq .filter-btn {
  flex: 0 0 auto;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-faq .filter-btn:hover {
  border-color: var(--violet);
  color: var(--text);
}

.page-faq .filter-btn.is-active {
  border-color: var(--violet);
  background: var(--violet-soft);
  color: var(--text);
}

.page-faq .branch-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 38px);
}

.page-faq .branch-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-content: start;
}

.page-faq .branch-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-soft);
  padding: 16px 16px 14px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-faq .branch-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: var(--orange);
}

.page-faq .branch-card[data-theme~="client"]::before {
  background: var(--violet);
}

.page-faq .branch-card[data-theme~="page"]::before {
  background: var(--cyan);
}

.page-faq .branch-card:hover {
  transform: translateY(-2px);
  border-color: rgba(139, 92, 246, 0.6);
}

.page-faq .branch-card.is-hidden {
  display: none;
}

.page-faq .branch-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.page-faq .branch-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.4;
}

.page-faq .branch-symptom {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-dim);
}

.page-faq .branch-details {
  margin-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .branch-details summary {
  padding: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .branch-details summary::after {
  content: "＋";
  margin-left: 8px;
  display: inline-block;
  transition: transform 0.22s ease;
}

.page-faq .branch-details[open] summary::after {
  content: "－";
  transform: rotate(90deg);
}

.page-faq .branch-details .disclosure-body {
  padding-top: 10px;
}

.page-faq .branch-actions {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
}

.page-faq .branch-actions li::marker {
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-faq .branch-aside-inner {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-night);
  padding: var(--faq-card-pad);
  position: sticky;
  top: 96px;
}

.page-faq .branch-aside-label {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--violet);
  margin: 0;
}

.page-faq .branch-aside-title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
}

.page-faq .branch-aside-text {
  font-size: 14px;
  color: var(--text-dim);
}

.page-faq .branch-aside-figure {
  margin: 18px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-deep);
}

.page-faq .branch-aside-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .branch-aside-foot {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 兼容适配 ---------- */
.page-faq .compat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 40px);
}

.page-faq .compat-list {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .compat-item {
  background: var(--bg-night);
  padding: 18px var(--faq-card-pad);
}

.page-faq .compat-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
}

.page-faq .compat-text {
  font-size: 14px;
  color: var(--text-dim);
  max-width: 40em;
}

.page-faq .compat-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  align-content: start;
}

.page-faq .data-figure {
  background: linear-gradient(150deg, var(--panel), var(--bg-deep));
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .data-value {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .data-label {
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ---------- 人工通道 ---------- */
.page-faq .relay-section {
  border-top: 1px solid var(--line);
}

.page-faq .relay-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .relay-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-night);
  padding: var(--faq-card-pad);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .relay-card--urgent {
  border-color: var(--faq-safe-line);
  background: linear-gradient(150deg, rgba(34, 211, 238, 0.08), var(--bg-night) 60%);
}

.page-faq .relay-flag {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.16em;
}

.page-faq .relay-card--urgent .relay-flag {
  color: var(--cyan);
}

.page-faq .relay-card--normal .relay-flag {
  color: var(--text-faint);
}

.page-faq .relay-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.45;
}

.page-faq .relay-text {
  font-size: 14px;
  color: var(--text-dim);
  max-width: 34em;
}

.page-faq .relay-card .btn {
  margin-top: auto;
  align-self: flex-start;
}

.page-faq .relay-band {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .relay-band-cell {
  background: var(--panel);
  padding: 14px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
}

.page-faq .relay-band-k {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-faq .relay-band-cell:last-child .relay-band-k {
  color: var(--text-faint);
}

.page-faq .relay-band-v {
  font-size: 14px;
  color: var(--text);
}

.page-faq .relay-contact {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.page-faq .relay-contact-line {
  font-size: 14.5px;
  color: var(--text);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.page-faq .relay-dot {
  color: var(--line);
}

.page-faq .relay-contact-note {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-faint);
}

.page-faq .relay-related {
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

/* ---------- 显现动画 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
}

.page-faq .has-js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.page-faq .has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.page-faq :focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .steps-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-intro-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-hint {
    margin-top: 10px;
  }

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

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

@media (min-width: 1080px) {
  .page-faq .branch-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .branch-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .step-rail-list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow-x: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .has-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .branch-card,
  .page-faq .step-node {
    transition: none;
  }
}
<<<END>>>