.page-faq {
  --faq-shadow: 5px 5px 0 var(--ink-900);
  --faq-gap: 16px;
  background: var(--paper-100);
  color: var(--ink-900);
  font-family: var(--font-cn);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-faq .breadcrumb {
  padding: 14px 0 4px;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--ink-900);
  color: var(--paper-000);
  padding: 26px 0 70px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -50px;
  width: 200px;
  height: 300px;
  background: var(--signal-orange);
  opacity: 0.16;
  transform: rotate(14deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: -34px;
  height: 68px;
  background: var(--paper-100);
  transform: skewY(-2.5deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__lead .index-label {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber-index);
  border-bottom: 2px solid var(--amber-index);
  padding-bottom: 2px;
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: -0.01em;
  max-width: 20ch;
}

.page-faq .faq-hero__text {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: #D6DEE8;
  max-width: 46ch;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero__facts li {
  font-size: 13px;
  padding: 5px 10px;
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  background: var(--ink-800);
  color: #E4EBF2;
}

.page-faq .faq-hero__facts .mono {
  color: var(--signal-orange);
  font-weight: 700;
  margin-right: 2px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__side {
  background: var(--ink-800);
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: 6px 6px 0 rgba(255, 106, 26, 0.55);
}

.page-faq .faq-hero__side-title {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-glow);
  font-weight: 600;
}

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

.page-faq .faq-hero__side-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: #E9EFF5;
}

.page-faq .faq-hero__side-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--steel-400);
  border-top: 2px solid var(--ink-600);
  padding-top: 10px;
}

/* ---------- 主结构：索引轨 + 正文 ---------- */
.page-faq .faq-shell {
  padding: 34px 0 10px;
  display: grid;
  gap: 26px;
}

.page-faq .faq-rail {
  position: relative;
  background: var(--paper-000);
  border: var(--border-ink);
  border-radius: var(--radius);
  padding: 14px 12px;
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-rail .index-rail__title {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-900);
}

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

.page-faq .faq-rail .index-rail__list li {
  flex: 0 0 auto;
}

.page-faq .faq-rail .index-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-900);
  text-decoration: none;
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  background: var(--paper-100);
  white-space: nowrap;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-rail .index-rail__link .mono {
  font-size: 12px;
  color: var(--steel-400);
}

.page-faq .faq-rail .index-rail__link[data-current="true"] {
  background: var(--signal-orange);
  border-color: var(--ink-900);
  color: var(--paper-000);
}

.page-faq .faq-rail .index-rail__link[data-current="true"] .mono {
  color: var(--paper-000);
}

.page-faq .faq-rail__foot {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 2px solid var(--ink-600);
  font-size: 12.5px;
  color: var(--ink-700);
}

.page-faq .faq-rail__foot a {
  color: var(--signal-orange);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-shell__main {
  min-width: 0;
  display: grid;
  gap: 40px;
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section__head {
  margin-bottom: 18px;
}

.page-faq .faq-section__head .index-label {
  display: inline-block;
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ink-700);
  border-bottom: 2px solid var(--cyan-glow);
  padding-bottom: 2px;
}

.page-faq .faq-section__head h2 {
  margin: 0 0 10px;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 900;
  max-width: 24ch;
}

.page-faq .faq-section__intro {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-700);
  max-width: 52ch;
}

.page-faq .faq-figure {
  border: var(--border-ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-000);
  box-shadow: var(--faq-shadow);
  margin: 0 0 20px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure--side img {
  aspect-ratio: 16 / 9;
}

.page-faq .faq-figure .media-frame__caption {
  display: block;
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-700);
  background: var(--paper-100);
  border-top: 2px solid var(--ink-900);
}

/* ---------- 八类条目 ---------- */
.page-faq .faq-cats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-cat {
  position: relative;
  background: var(--paper-000);
  border: var(--border-ink);
  border-radius: var(--radius);
  padding: 20px 14px 14px;
  scroll-margin-top: 120px;
}

.page-faq .faq-cat::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 64px;
  height: 6px;
  background: var(--signal-orange);
}

.page-faq .faq-cat:nth-child(3n+2)::before {
  background: var(--cyan-glow);
}

.page-faq .faq-cat:nth-child(3n)::before {
  background: var(--amber-index);
}

.page-faq .faq-cat__no {
  margin: 0 0 6px;
  font-size: 12px;
  color: var(--steel-400);
}

.page-faq .faq-cat__name {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
}

.page-faq .faq-cat__count {
  display: inline-block;
  margin: 0 0 10px;
  padding: 2px 8px;
  font-size: 12.5px;
  background: var(--ink-900);
  color: var(--paper-000);
  border-radius: var(--radius);
}

.page-faq .faq-cat__count .mono {
  font-weight: 700;
}

.page-faq .faq-cat__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-faq .faq-cat__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-700);
}

.page-faq .faq-cat__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 2px;
  background: var(--ink-600);
}

/* ---------- 更新时间读法 ---------- */
.page-faq .faq-section--band {
  background: var(--ink-800);
  color: var(--paper-000);
  border: var(--border-ink);
  border-radius: var(--radius);
  padding: 24px 16px 26px;
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-section--band .faq-section__head .index-label {
  color: var(--cyan-glow);
  border-bottom-color: var(--cyan-glow);
}

.page-faq .faq-section--band .faq-section__head h2 {
  color: var(--paper-000);
}

.page-faq .faq-section--band .faq-section__intro {
  color: #C9D5E1;
}

.page-faq .faq-read {
  display: grid;
  gap: 20px;
}

.page-faq .faq-read__dl {
  margin: 0 0 16px;
  display: grid;
  gap: 0;
}

.page-faq .faq-read__row {
  padding: 12px 0 12px 12px;
  border-left: 2px solid var(--ink-600);
}

.page-faq .faq-read__row:first-child {
  border-left-color: var(--signal-orange);
}

.page-faq .faq-read__row dt {
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-glow);
  margin-bottom: 4px;
}

.page-faq .faq-read__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #D8E1EA;
}

.page-faq .faq-read__legend {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  border-top: 2px solid var(--ink-600);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.page-faq .faq-read__legend .legend__item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: #C9D5E1;
}

.page-faq .faq-read__legend .legend__swatch {
  width: 12px;
  height: 12px;
  border-radius: 1px;
  display: inline-block;
}

.page-faq .faq-read__legend .legend__swatch--orange { background: var(--signal-orange); }
.page-faq .faq-read__legend .legend__swatch--cyan { background: var(--cyan-glow); }
.page-faq .faq-read__legend .legend__swatch--amber { background: var(--amber-index); }
.page-faq .faq-read__legend .legend__swatch--ok { background: var(--green-ok); }

.page-faq .faq-section--band .faq-figure {
  border-color: var(--ink-600);
  box-shadow: 6px 6px 0 var(--cyan-glow);
  background: var(--ink-900);
}

.page-faq .faq-section--band .faq-figure .media-frame__caption {
  background: var(--ink-900);
  color: #C9D5E1;
  border-top-color: var(--ink-600);
}

/* ---------- 高频条目 ---------- */
.page-faq .faq-acc {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  background: var(--paper-000);
  border: var(--border-ink);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 rgba(11, 26, 43, 0.16);
  transition: box-shadow 200ms var(--ease);
}

.page-faq .faq-item[open] {
  box-shadow: inset 6px 0 0 var(--signal-orange), 4px 4px 0 rgba(11, 26, 43, 0.2);
}

.page-faq .faq-item__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px 14px;
  padding: 14px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q {
  flex: 1 1 220px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink-900);
}

.page-faq .faq-item__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.page-faq .faq-item__time {
  font-size: 12.5px;
  color: var(--steel-400);
  border-bottom: 2px solid var(--ink-600);
  padding-bottom: 1px;
}

.page-faq .faq-item__body {
  padding: 0 14px 16px 18px;
  border-top: 2px solid var(--paper-100);
}

.page-faq .faq-item__body p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-700);
}

.page-faq .faq-item__links {
  font-size: 13px !important;
  color: var(--ink-900) !important;
}

.page-faq .faq-item__links a {
  color: var(--ink-900);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--cyan-glow);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  margin-top: 46px;
  background: var(--ink-900);
  color: var(--paper-000);
  padding: 40px 0 48px;
}

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

.page-faq .faq-next .index-label {
  display: inline-block;
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--signal-orange);
  border-bottom: 2px solid var(--signal-orange);
  padding-bottom: 2px;
}

.page-faq .faq-next h2 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 900;
}

.page-faq .faq-next__lead {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.85;
  color: #CFD9E3;
  max-width: 52ch;
}

.page-faq .faq-next__steps {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-next__steps li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.75;
  color: #DDE5ED;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink-600);
}

.page-faq .faq-next__step-no {
  flex: 0 0 auto;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--amber-index);
  border-bottom: 2px solid var(--amber-index);
  padding-bottom: 1px;
}

.page-faq .faq-next__bar {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-next__cell {
  background: var(--paper-000);
  border: var(--border-ink);
  border-radius: var(--radius);
  padding: 14px;
  color: var(--ink-900);
  display: grid;
  gap: 8px;
  justify-items: start;
  box-shadow: 5px 5px 0 var(--signal-orange);
}

.page-faq .faq-next__cell--plain {
  box-shadow: 5px 5px 0 var(--cyan-glow);
}

.page-faq .faq-next__cell .contact-cell__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-700);
}

.page-faq .faq-next__cell .contact-cell__value {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-next__cell--plain .contact-cell__value {
  font-size: 13.5px;
  font-weight: 400;
  color: var(--ink-700);
}

.page-faq .faq-next__cell .copy-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 5px 10px;
  border: 2px solid var(--ink-900);
  border-radius: var(--radius);
  background: var(--paper-100);
  color: var(--ink-900);
  cursor: pointer;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-next__cell .copy-btn:hover {
  background: var(--ink-900);
  color: var(--paper-000);
}

.page-faq .faq-next__cell .copy-btn[data-copy-state="done"] {
  background: var(--green-ok);
  border-color: var(--ink-900);
  color: var(--paper-000);
}

.page-faq .faq-next__note {
  margin: 20px 0 22px;
  font-size: 13.5px;
  line-height: 1.8;
  color: #B9C6D3;
  border-top: 2px solid var(--ink-600);
  padding-top: 14px;
  max-width: 56ch;
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 40px 0 84px;
  }

  .page-faq .faq-hero h1 {
    font-size: 38px;
    line-height: 1.28;
  }

  .page-faq .faq-hero__text {
    font-size: 16px;
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-section__head h2,
  .page-faq .faq-next h2 {
    font-size: 28px;
  }

  .page-faq .faq-next__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
  }

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

  .page-faq .faq-next__cell--plain {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
    padding-top: 46px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 108px;
    padding: 16px 14px;
  }

  .page-faq .faq-rail .index-rail__list {
    flex-direction: column;
    overflow-x: visible;
    gap: 4px;
  }

  .page-faq .faq-rail .index-rail__link {
    justify-content: space-between;
    width: 100%;
    border: none;
    border-left: 4px solid transparent;
    background: transparent;
    padding: 8px 8px 8px 10px;
    white-space: normal;
    font-size: 13.5px;
  }

  .page-faq .faq-rail .index-rail__link:hover {
    background: var(--paper-100);
  }

  .page-faq .faq-rail .index-rail__link[data-current="true"] {
    background: var(--paper-100);
    color: var(--ink-900);
    border-left-color: var(--signal-orange);
  }

  .page-faq .faq-rail .index-rail__link[data-current="true"] .mono {
    color: var(--signal-orange);
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-hero h1 {
    font-size: 44px;
    line-height: 1.24;
  }

  .page-faq .faq-read {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-section--band {
    padding: 32px 30px 34px;
  }

  .page-faq .faq-figure--wide {
    max-width: 720px;
  }

  .page-faq .faq-cat {
    padding: 22px 18px 18px;
  }

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

  .page-faq .faq-next__cell--plain {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail .index-rail__link,
  .page-faq .faq-item,
  .page-faq .faq-next__cell .copy-btn {
    transition: none;
  }
}