.page-faq {
  --faq-narrow: 880px;
  --faq-hair: rgba(124, 139, 176, 0.24);
  --faq-hair-light: rgba(11, 22, 51, 0.14);
  background: var(--c-ink-deep);
  color: var(--txt-on-dark);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(20px, 3.5vw, 40px) 0 clamp(24px, 4vw, 48px);
  background:
    radial-gradient(120% 80% at 88% -10%, rgba(0, 230, 118, 0.10), transparent 60%),
    linear-gradient(175deg, var(--c-ink) 0%, var(--c-ink-deep) 100%);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--c-glass-line);
  padding: clamp(26px, 4vw, 52px) clamp(18px, 4vw, 52px) clamp(30px, 4.5vw, 58px);
  background: linear-gradient(150deg, rgba(18, 36, 92, 0.55), rgba(6, 11, 26, 0.15));
}

.page-faq .faq-hero__frame::before {
  content: "";
  display: block;
  height: 12px;
  margin: calc(-1 * clamp(26px, 4vw, 52px)) calc(-1 * clamp(18px, 4vw, 52px)) clamp(22px, 3vw, 34px);
  background-image: repeating-linear-gradient(90deg, var(--faq-hair) 0 1px, transparent 1px 22px);
  border-bottom: 1px solid var(--c-glass-line);
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  top: -1px;
  right: clamp(18px, 4vw, 52px);
  width: 42px;
  height: 3px;
  background: var(--c-neon);
}

.page-faq .eyebrow {
  color: var(--c-neon);
  letter-spacing: 0.16em;
}

.page-faq .faq-hero__title {
  margin: 12px 0 20px;
  font-size: clamp(30px, 5.6vw, 60px);
  font-weight: 250;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--txt-on-dark);
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.8;
  color: var(--txt-on-dark-dim);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px 28px;
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: 22px;
  border-top: 1px solid var(--c-glass-line);
}

.page-faq .faq-hero__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-neon);
}

.page-faq .faq-hero__stat span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--txt-on-dark-dim);
}

/* ---------- 主题索引条 ---------- */

.page-faq .faq-index {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  background: rgba(6, 11, 26, 0.94);
  border-top: 1px solid var(--c-glass-line);
  border-bottom: 1px solid var(--c-glass-line);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 2px;
  padding: 8px var(--pad-x);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  color: var(--txt-on-dark-dim);
  border: 1px solid transparent;
  transition: color 0.24s var(--ease-out), border-color 0.24s var(--ease-out);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-neon);
  border-color: var(--line-dark);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-mist);
}

/* ---------- 章节通用 ---------- */

.page-faq .faq-block {
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-faq .faq-block--last {
  padding-bottom: clamp(56px, 8vw, 108px);
}

.page-faq .faq-block__lead {
  max-width: 68ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-narrow {
  max-width: var(--faq-narrow);
}

.page-faq .faq-sub {
  margin: clamp(30px, 4vw, 44px) 0 0;
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--txt-on-light);
}

.page-faq .faq-narrow p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .section--paper .faq-narrow p,
.page-faq .section--paper .faq-compare__card p {
  color: var(--txt-on-light-dim);
}

.page-faq .section--deep .faq-narrow p,
.page-faq .section--ink .faq-narrow p {
  color: var(--txt-on-dark-dim);
}

.page-faq .section--paper .faq-lead,
.page-faq .section--paper .lead {
  color: var(--txt-on-light-dim);
}

.page-faq .section--paper .chapter__index {
  color: var(--txt-on-light-dim);
}

.page-faq .section--paper .chapter__title {
  color: var(--txt-on-light);
}

.page-faq .section--ink .faq-sub {
  color: var(--txt-on-dark);
}

.page-faq .faq-note {
  margin-top: clamp(22px, 3vw, 32px);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.8;
  border-left: 2px solid var(--c-orange);
  background: rgba(255, 138, 31, 0.06);
}

.page-faq .section--paper .faq-note {
  color: var(--txt-on-light-dim);
}

.page-faq .section--ink .faq-note {
  color: var(--txt-on-dark-dim);
}

.page-faq .faq-note--dark {
  border-left-color: var(--c-neon);
  background: var(--c-glass);
  color: var(--txt-on-dark-dim);
}

.page-faq .faq-note a,
.page-faq .faq-a a {
  color: var(--c-neon);
  text-decoration: underline;
  text-decoration-color: rgba(0, 230, 118, 0.4);
  text-underline-offset: 3px;
}

.page-faq .section--paper .faq-note a,
.page-faq .section--paper .faq-a a {
  color: var(--c-neon-deep);
  text-decoration-color: rgba(6, 129, 63, 0.4);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-list {
  max-width: var(--faq-narrow);
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-dark);
  border-left: 2px solid transparent;
  transition: border-left-color 0.24s var(--ease-out), background-color 0.24s var(--ease-out);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-neon);
  background: rgba(0, 230, 118, 0.04);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 16px 12px;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease-out);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-item[open] > .faq-q .faq-q__text {
  color: var(--c-neon);
}

.page-faq .faq-q__num {
  font-size: 12px;
  line-height: 1.9;
  color: var(--c-mist);
}

.page-faq .faq-q__text {
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  font-weight: 600;
  line-height: 1.7;
  color: var(--txt-on-dark);
  transition: color 0.2s var(--ease-out);
}

.page-faq .faq-q__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 8px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--c-mist);
  transition: transform 0.24s var(--ease-out), background-color 0.24s var(--ease-out);
}

.page-faq .faq-q__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-q__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-q__mark::before {
  background: var(--c-neon);
}

.page-faq .faq-a {
  padding: 0 12px 20px 12px;
}

.page-faq .faq-a p {
  max-width: 66ch;
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--txt-on-dark-dim);
}

.page-faq .faq-a__more {
  margin-top: 6px;
  font-size: 13px;
}

.page-faq .faq-a__more a {
  text-decoration: none;
  font-weight: 600;
}

/* ---------- 字段定义列表 ---------- */

.page-faq .field-list {
  display: grid;
  grid-template-columns: minmax(84px, 128px) 1fr;
  margin: 18px 0 0;
  border-top: 1px solid var(--faq-hair-light);
}

.page-faq .field-list dt {
  padding: 14px 10px 14px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  text-align: right;
  color: var(--c-pitch);
  border-bottom: 1px solid var(--faq-hair-light);
  word-break: break-word;
}

.page-faq .field-list dd {
  margin: 0;
  padding: 14px 0 14px 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--txt-on-light-dim);
  border-bottom: 1px solid var(--faq-hair-light);
}

/* ---------- 图文与要点 ---------- */

.page-faq .faq-figure {
  margin: 0 0 clamp(24px, 3.5vw, 36px);
}

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

.page-faq .faq-figure .media__caption {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

.page-faq .faq-points {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-points li {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-points h3 {
  margin: 0 0 8px;
  font-size: clamp(15px, 1.7vw, 18px);
  font-weight: 700;
  color: var(--c-lime);
}

.page-faq .faq-points p {
  max-width: 68ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--txt-on-dark-dim);
}

/* ---------- 表格 ---------- */

.page-faq .table-wrap {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .data-table th.mono,
.page-faq .data-table td.mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
}

/* ---------- 对比卡片 ---------- */

.page-faq .faq-compare {
  gap: clamp(16px, 2.5vw, 28px);
  margin-bottom: clamp(8px, 2vw, 16px);
}

.page-faq .faq-compare__card {
  padding: clamp(20px, 2.8vw, 30px);
  background: #ffffff;
  border: 1px solid var(--faq-hair-light);
  border-top: 3px solid var(--c-pitch);
}

.page-faq .faq-compare__card:nth-child(2) {
  border-top-color: var(--c-orange);
}

.page-faq .faq-compare__card h3 {
  margin: 14px 0 10px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--txt-on-light);
}

.page-faq .faq-compare__card p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
}

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

/* ---------- 接入方式 ---------- */

.page-faq .faq-access {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-faq .faq-access__item {
  padding: clamp(20px, 3vw, 30px);
  background: var(--c-pitch);
}

.page-faq .faq-access__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-neon);
}

.page-faq .faq-access__item h3 {
  margin: 10px 0 8px;
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 700;
  color: var(--txt-on-dark);
}

.page-faq .faq-access__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--txt-on-dark-dim);
}

.page-faq .faq-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-faq .faq-panel {
  padding: clamp(20px, 3vw, 30px);
  background: var(--c-glass);
  border: 1px solid var(--c-glass-line);
}

.page-faq .faq-panel__title {
  margin: 0 0 14px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  color: var(--c-lime);
}

.page-faq .faq-list-plain {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list-plain li {
  padding: 10px 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--txt-on-dark-dim);
  border-bottom: 1px solid var(--c-glass-line);
}

.page-faq .faq-list-plain li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-faq .faq-list-plain b {
  color: var(--txt-on-dark);
  font-weight: 700;
}

/* ---------- 更正步骤 ---------- */

.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 22px clamp(16px, 2.5vw, 26px);
  background: var(--c-ink);
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-neon) 0%, var(--c-aqua) 55%, transparent 100%);
  opacity: 0.75;
}

.page-faq .faq-steps__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-neon);
}

.page-faq .faq-steps__item h3 {
  margin: 10px 0 8px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 700;
  color: var(--txt-on-dark);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--txt-on-dark-dim);
}

/* ---------- 联系条 ---------- */

.page-faq .faq-contact-bar {
  margin-top: clamp(30px, 4vw, 46px);
  padding: clamp(22px, 3.5vw, 38px);
  background: linear-gradient(140deg, rgba(18, 36, 92, 0.85), rgba(6, 11, 26, 0.6));
  border: 1px solid var(--c-glass-line);
  border-left: 3px solid var(--c-neon);
}

.page-faq .faq-contact-bar__text {
  max-width: 68ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--txt-on-dark-dim);
}

.page-faq .faq-contact-bar__text a {
  color: var(--c-neon);
  text-decoration: underline;
  text-decoration-color: rgba(0, 230, 118, 0.4);
  text-underline-offset: 3px;
}

.page-faq .faq-contact-bar__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-contact-bar__meta {
  margin: 20px 0 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

/* ---------- 焦点可见性 ---------- */

.page-faq .faq-q:focus-visible,
.page-faq .faq-index__link:focus-visible,
.page-faq .faq-a a:focus-visible,
.page-faq .btn:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-a {
    padding: 0 32px 24px 44px;
  }

  .page-faq .faq-q {
    padding: 18px 16px;
    gap: 16px;
  }

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

  .page-faq .faq-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(16px, 2.4vw, 26px);
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero {
    padding-top: clamp(28px, 3vw, 48px);
  }

  .page-faq .faq-narrow {
    max-width: var(--faq-narrow);
  }

  .page-faq .faq-index__list {
    justify-content: flex-start;
  }
}

@media (min-width: 1300px) {
  .page-faq .faq-narrow {
    margin-left: clamp(0px, 4vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-q__text,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}