.page-faq {
  background: var(--ink-900);
  color: var(--paper-white);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: hidden;
}

/* 版本变动条 */
.page-faq .faq-versionbar {
  background: var(--ink-800);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-versionbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding-block: 12px;
}
.page-faq .faq-versionbar__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid rgba(53, 242, 216, 0.35);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}
.page-faq .faq-versionbar__text {
  flex: 1 1 240px;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}
.page-faq .faq-versionbar__link {
  font-size: 12px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 216, 0.35);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-faq .faq-versionbar__link:hover,
.page-faq .faq-versionbar__link:focus-visible {
  color: var(--paper-white);
  border-color: var(--paper-white);
}

.page-faq .faq-crumbs {
  padding-top: clamp(14px, 2vw, 22px);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-block: clamp(32px, 5.5vw, 68px) clamp(26px, 4vw, 48px);
}
.page-faq .faq-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.page-faq .faq-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
}
.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.025em;
}
.page-faq .faq-hero h1 span {
  color: var(--cyan);
}
.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}
.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--mist);
}
.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.page-faq .faq-hero__facts b {
  font-family: var(--font-data);
  font-size: 18px;
  font-weight: 600;
  color: var(--paper-white);
  letter-spacing: -0.01em;
}

/* 四类入口 */
.page-faq .faq-index {
  padding-block: clamp(8px, 2vw, 22px) clamp(30px, 4vw, 52px);
}
.page-faq .faq-index__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 27px);
  letter-spacing: -0.015em;
}
.page-faq .faq-index__note {
  margin: 0 0 22px;
  font-size: 14px;
  color: var(--mist);
}
.page-faq .faq-jump {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-faq .faq-jump > li {
  background: var(--ink-900);
}
.page-faq .faq-jump__link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 14px;
  padding: 18px 16px;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s var(--ease);
}
.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  background: var(--ink-700);
}
.page-faq .faq-jump__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-faq .faq-jump__num {
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-faq .faq-jump__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-white);
}
.page-faq .faq-jump__desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* 区块骨架 */
.page-faq .faq-block {
  padding-block: clamp(32px, 4.8vw, 58px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 84px;
}
.page-faq .faq-block__head {
  display: grid;
  gap: 10px;
  max-width: 74ch;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}
.page-faq .faq-block__num {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}
.page-faq .faq-block:target .faq-block__num {
  color: var(--orange);
}
.page-faq .faq-block h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.018em;
}
.page-faq .faq-block__intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* 手风琴 */
.page-faq .faq-list {
  border-top: 1px solid var(--line-soft);
}
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .faq-item > summary {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px 14px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.page-faq .faq-item[open] > summary::after {
  transform: scaleX(1);
}
.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-faq .faq-item__num {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}
.page-faq .faq-item[open] .faq-item__num {
  color: var(--cyan);
}
.page-faq .faq-item__q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.6vw, 19px);
  line-height: 1.5;
}
.page-faq .faq-item__mark {
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-right: 2px solid var(--scale);
  border-bottom: 2px solid var(--scale);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}
.page-faq .faq-item__body {
  display: grid;
  gap: 18px;
  padding: 2px 0 26px;
}
.page-faq .faq-item__aside {
  min-width: 0;
}

/* 步骤 */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: faqstep;
}
.page-faq .steps > li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: #D7DEE6;
}
.page-faq .steps > li::before {
  content: counter(faqstep);
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-top: 1px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--cyan);
}
.page-faq .steps > li:not(:last-child) {
  background-image: linear-gradient(to bottom, var(--line-strong), transparent);
  background-repeat: no-repeat;
  background-position: 13px 32px;
  background-size: 1px calc(100% - 18px);
}

/* 可勾选清单 */
.page-faq .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-faq .checklist label {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  cursor: pointer;
  font-size: 14.5px;
  line-height: 1.75;
  color: #D7DEE6;
}
.page-faq .checklist input {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-faq .checklist input:checked {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 2px var(--ink-900);
}
.page-faq .checklist input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-faq .checklist input:checked ~ span {
  color: var(--mist);
  text-decoration: line-through;
  text-decoration-color: rgba(140, 154, 168, 0.55);
}
.page-faq .faq-inline-link {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--mist);
}
.page-faq .faq-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 216, 0.35);
}
.page-faq .faq-inline-link a:hover {
  color: var(--paper-white);
  border-color: var(--paper-white);
}

/* 示意面板 */
.page-faq .viz {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: linear-gradient(158deg, rgba(17, 22, 31, 0.95), rgba(6, 8, 13, 0.95));
  color: var(--cyan);
  align-self: start;
}
.page-faq .viz figcaption {
  padding-left: 9px;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.page-faq .viz__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}
.page-faq .viz svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-faq .viz--photo {
  padding: 0;
  overflow: hidden;
  border-color: var(--line-strong);
}
.page-faq .viz--photo img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .viz--photo figcaption {
  margin: 10px 12px 14px;
}

.page-faq .pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .pill {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--mist);
  white-space: nowrap;
}
.page-faq .pill.is-on {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04120F;
}

.page-faq .synctrack {
  display: grid;
  gap: 8px;
}
.page-faq .synctrack__bar {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: rgba(200, 210, 220, 0.14);
  overflow: hidden;
}
.page-faq .synctrack__bar::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 64%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
}
.page-faq .synctrack__labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--mist);
}

.page-faq .windowbar {
  position: relative;
  height: 8px;
  border-radius: 4px;
  background: rgba(200, 210, 220, 0.12);
}
.page-faq .windowbar__fill {
  position: absolute;
  left: 22%;
  width: 34%;
  top: 0;
  bottom: 0;
  border-radius: 4px;
  background: var(--orange);
  box-shadow: 0 0 14px -2px rgba(255, 122, 41, 0.7);
}

/* 权限三级 */
.page-faq .tiers {
  display: grid;
  gap: 14px;
}
.page-faq .tier {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--ink-700);
}
.page-faq .tier__name {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-faq .tier__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
}
.page-faq .tier__list {
  margin: 2px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}
.page-faq .faq-note {
  margin-top: 18px;
  padding: 16px 18px;
  border-left: 2px solid var(--orange);
  background: rgba(255, 122, 41, 0.06);
}
.page-faq .faq-note__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
}
.page-faq .faq-note__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* 纸色研究板 */
.page-faq .faq-block--paper {
  background-color: var(--paper);
  background-image: repeating-linear-gradient(0deg, rgba(29, 35, 43, 0.035) 0 1px, transparent 1px 5px);
  color: var(--ink-on-paper);
  border-top: 2px solid var(--cyan-deep);
  border-radius: 2px;
  padding-block: clamp(32px, 4.8vw, 58px);
  margin-block: clamp(20px, 3vw, 36px);
}
.page-faq .faq-block--paper h2 {
  color: var(--ink-on-paper);
}
.page-faq .faq-block--paper .faq-block__num {
  color: var(--cyan-deep);
}
.page-faq .faq-block--paper .faq-block__intro {
  color: #5A6472;
}
.page-faq .terms-layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-faq .terms-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0;
}
.page-faq .term {
  display: grid;
  gap: 6px;
  padding: 16px;
  background: var(--paper-white);
  border: 1px solid rgba(29, 35, 43, 0.14);
  border-radius: 2px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-faq .term:hover,
.page-faq .term:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan-deep);
  box-shadow: 0 16px 28px -22px rgba(0, 0, 0, 0.7);
}
.page-faq .term dt {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  color: var(--ink-on-paper);
}
.page-faq .term dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: #4C5665;
}
.page-faq .terms-figure {
  margin: 0;
}
.page-faq .terms-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
  border: 1px solid rgba(29, 35, 43, 0.18);
}
.page-faq .terms-note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #4C5665;
}
.page-faq .terms-note a {
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 90, 82, 0.45);
}
.page-faq .terms-note a:hover {
  color: var(--ink-on-paper);
  border-color: var(--ink-on-paper);
}

/* 联系 */
.page-faq .help-grid {
  display: grid;
  gap: 14px;
}
.page-faq .help-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--ink-800);
}
.page-faq .help-card__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.page-faq .help-card__value {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper-white);
  word-break: break-word;
}
.page-faq .help-card__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
}

/* 响应式 */
@media (min-width: 600px) {
  .page-faq .terms-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 760px) {
  .page-faq .tiers,
  .page-faq .help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-jump {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-item__body {
    padding-right: 8px;
  }
  .page-faq .faq-item__body:has(.faq-item__aside) {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
  }
}

@media (min-width: 940px) {
  .page-faq .terms-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary::after,
  .page-faq .faq-item__mark,
  .page-faq .term,
  .page-faq .faq-jump__link,
  .page-faq .checklist input {
    transition: none;
  }
}