.page-faq {
  --faq-rail-w: 220px;
  --faq-gap: clamp(20px, 3vw, 44px);
  --faq-shadow: 6px 6px 0 rgba(6, 18, 31, 0.55);
  --faq-tint: rgba(212, 175, 55, 0.08);
  color: var(--paper);
}

.page-faq .shell--flush {
  padding-left: 0;
  padding-right: 0;
}

.page-faq .faq-dir .shell--flush {
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

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

.page-faq .faq-hero-grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 18px;
  font-size: clamp(30px, 6vw, var(--fs-page));
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: 0.01em;
  max-width: 18ch;
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  color: var(--muted);
}

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

.page-faq .faq-hero-side {
  border-left: 3px solid var(--gold);
  padding: 6px 0 6px 20px;
  background: var(--faq-tint);
}

.page-faq .faq-side-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
  text-transform: uppercase;
}

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

.page-faq .faq-side-list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-side-num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--muted);
}

/* ---------- 现象分类命令栏 ---------- */
.page-faq .faq-dir {
  background: var(--ink-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: clamp(32px, 5vw, 64px);
}

.page-faq .faq-dir-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-dir-list li {
  flex: none;
  min-width: 62%;
  scroll-snap-align: start;
}

.page-faq .faq-chip {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-right: 1px solid var(--line);
  text-decoration: none;
  color: var(--paper);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: var(--panel);
}

.page-faq .faq-chip-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-chip-text {
  font-size: 16px;
  font-weight: 700;
}

/* ---------- 路径图 ---------- */
.page-faq .faq-path-section {
  padding-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-path {
  margin: 0 auto;
  max-width: 720px;
}

.page-faq .faq-path img,
.page-faq .faq-flow-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-rail {
  border-top: 3px solid var(--gold);
  padding-top: 16px;
}

.page-faq .faq-rail-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail-list li {
  flex: none;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  white-space: nowrap;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-deep);
}

.page-faq .faq-rail-link:hover .faq-rail-num,
.page-faq .faq-rail-link:focus-visible .faq-rail-num {
  color: var(--ink-deep);
}

.page-faq .faq-rail-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
}

.page-faq .faq-rail-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-group {
  scroll-margin-top: 110px;
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: clamp(22px, 3.6vw, var(--fs-section));
  font-weight: 900;
  line-height: 1.3;
}

.page-faq .faq-group-note {
  margin: 10px 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 60ch;
}

/* ---------- 折叠问答 ---------- */
.page-faq .accordion-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  box-shadow: var(--faq-shadow);
  margin-bottom: 16px;
  transition: border-color 0.2s var(--ease);
}

.page-faq .accordion-item:hover,
.page-faq .accordion-item:focus-within {
  border-left-color: var(--gold);
}

.page-faq .qa-heading {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-faq .accordion-trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: transparent;
  border: 0;
  color: var(--paper);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .qa-num {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold);
  transition: color 0.2s var(--ease);
}

.page-faq .accordion-trigger[aria-expanded="true"] .qa-num {
  color: var(--gold-lit);
}

.page-faq .qa-title {
  font-size: clamp(16px, 2.2vw, var(--fs-card));
  font-weight: 700;
  line-height: 1.55;
}

.page-faq .qa-sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin: 8px 0 0 auto;
}

.page-faq .qa-sign::before,
.page-faq .qa-sign::after {
  content: "";
  position: absolute;
  background: var(--gold);
}

.page-faq .qa-sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa-sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: transform 0.2s var(--ease);
}

.page-faq .accordion-trigger[aria-expanded="true"] .qa-sign::after {
  transform: scaleY(0);
}

.page-faq .qa-body {
  margin: 0 18px 18px;
  padding: 4px 0 4px 16px;
  border-left: 3px solid var(--line);
}

.page-faq .qa-body p {
  margin: 0 0 12px;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .qa-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 两步反馈 ---------- */
.page-faq .faq-flow-grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 28px;
}

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

.page-faq .faq-step {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  padding: 22px 20px;
}

.page-faq .faq-step--accent {
  border-top-color: var(--lime);
}

.page-faq .faq-step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-num);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-step--accent .faq-step-num {
  color: var(--lime);
}

.page-faq .faq-step-title {
  margin: 14px 0 10px;
  font-size: var(--fs-card);
  font-weight: 700;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 46ch;
}

.page-faq .faq-flow-media {
  margin: 0;
}

/* ---------- 兜底联系 ---------- */
.page-faq .faq-help {
  border-top: 1px solid var(--line);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-help .prose {
  max-width: 58ch;
  color: var(--muted);
}

.page-faq .faq-help-links {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-help-links .tool-link {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-help-links .tool-link:hover,
.page-faq .faq-help-links .tool-link:focus-visible {
  background: var(--panel);
  border-left-color: var(--gold-lit);
}

.page-faq .faq-contact-card {
  align-self: start;
}

.page-faq .faq-contact-card .contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact-card .contact-line:first-child {
  padding-top: 0;
}

.page-faq .faq-contact-card .contact-key {
  flex: none;
  min-width: 76px;
  font-size: 14px;
  color: var(--muted);
}

.page-faq .faq-contact-card .contact-val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-contact-tip {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  background: rgba(240, 169, 59, 0.08);
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-dir-list li {
    flex: 1 1 0;
    min-width: 0;
  }

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

  .page-faq .faq-dir-list li:nth-child(3n) .faq-chip {
    border-right: 0;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
  }

  .page-faq .faq-dir-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-dir-list li:nth-child(3n) .faq-chip {
    border-right: 1px solid var(--line);
  }

  .page-faq .faq-dir-list li:last-child .faq-chip {
    border-right: 0;
  }

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

  .page-faq .faq-help-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-stream {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    overflow: visible;
    gap: 8px;
  }

  .page-faq .faq-rail-link {
    justify-content: flex-start;
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-rail-link,
  .page-faq .accordion-item,
  .page-faq .qa-num,
  .page-faq .qa-sign::after,
  .page-faq .faq-help-links .tool-link {
    transition: none;
  }
}