.page-faq {
  --faq-gap: clamp(20px, 3vw, 34px);
  --faq-sticky: 96px;
}

.page-faq .guide-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 52px) 0 clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.page-faq .guide-hero__kicker {
  margin: 16px 0 14px;
}

.page-faq .guide-hero h1 {
  margin: 0 0 18px;
  max-width: 20em;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .guide-hero__lead {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  max-width: 50em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.68;
  color: var(--paper-2);
}

.page-faq .guide-hero__lead a {
  color: var(--cyan);
}

/* ---------- 路径示意图 ---------- */

.page-faq .route-map {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
}

.page-faq .route-map__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: saturate(0.7) contrast(1.1);
  pointer-events: none;
}

.page-faq .route-map__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-faq .route-map__node {
  padding: 18px 16px 20px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 26, 42, 0.6), rgba(14, 43, 38, 0.78));
}

.page-faq .route-map__node:first-child {
  border-top: none;
}

.page-faq .route-map__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .route-map__label {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-faq .route-map__desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-3);
}

/* ---------- 主体骨架 ---------- */

.page-faq .guide-shell {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(28px, 4vw, 46px) 0 clamp(44px, 6vw, 84px);
}

.page-faq .guide-index {
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 16px 14px;
}

.page-faq .guide-index__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .guide-index__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .guide-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px 8px 10px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--paper-2);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-faq .guide-index__link span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .guide-index__link:hover,
.page-faq .guide-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(43, 227, 200, 0.07);
  outline: none;
}

.page-faq .guide-index__foot {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-2);
}

/* ---------- 区块 ---------- */

.page-faq .guide-block {
  margin-bottom: clamp(34px, 5vw, 62px);
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .guide-block:last-of-type {
  margin-bottom: clamp(24px, 3.5vw, 40px);
}

.page-faq .guide-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-2);
}

.page-faq .guide-block__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-faq .guide-block__title {
  margin: 0;
  font-size: clamp(20px, 3.2vw, 28px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .guide-block__note {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-3);
}

.page-faq .guide-block__tail {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper-2);
}

.page-faq .guide-block__tail a,
.page-faq .split__text a,
.page-faq .step-list__text a,
.page-faq .guide-cta__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 200, 0.45);
}

.page-faq .guide-block__tail a:hover,
.page-faq .split__text a:hover,
.page-faq .step-list__text a:hover,
.page-faq .guide-cta__text a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 三步列表 ---------- */

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

.page-faq .step-list__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 16px;
  border: 1px solid var(--line-2);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(14, 43, 38, 0.82), rgba(10, 26, 42, 0.55));
}

.page-faq .step-list__num {
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-faq .step-list__title {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .step-list__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--paper-2);
}

/* ---------- 通用两栏 ---------- */

.page-faq .split {
  display: grid;
  gap: 22px;
}

.page-faq .split__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--paper-2);
}

.page-faq .check-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .check-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--paper-2);
}

.page-faq .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-faq .axis-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-2);
}

.page-faq .axis-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.92;
}

.page-faq .axis-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-2);
  font-size: 12px;
  line-height: 1.55;
  color: var(--paper-3);
}

/* ---------- 三个维度 ---------- */

.page-faq .dim-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.page-faq .dim-card {
  padding: 16px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-faq .dim-card__tag {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-faq .dim-card__title {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .dim-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-2);
}

/* ---------- 数据条 ---------- */

.page-faq .datalist {
  margin: 0;
  border-top: 1px solid var(--line-2);
}

.page-faq .datalist__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-2);
}

.page-faq .datalist__key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--moss-2);
}

.page-faq .datalist__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper);
}

/* ---------- 两端对比 ---------- */

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

.page-faq .compare-col {
  padding: 18px 16px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--panel-2);
}

.page-faq .compare-col--mobile {
  border-top: 3px solid var(--orange);
}

.page-faq .compare-col--desktop {
  border-top: 3px solid var(--cyan);
}

.page-faq .compare-col__title {
  margin: 0 0 12px;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .compare-bar {
  height: 6px;
  margin: 0 0 16px;
  border-radius: 999px;
  background: rgba(56, 71, 75, 0.55);
  overflow: hidden;
}

.page-faq .compare-bar span {
  display: block;
  height: 100%;
  background: var(--orange);
}

.page-faq .compare-bar--wide span {
  background: var(--cyan);
}

.page-faq .compare-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .compare-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-2);
}

.page-faq .compare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--paper-4);
}

/* ---------- 筛选条 ---------- */

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  margin-bottom: 20px;
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}

.page-faq .filter-btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 7px 12px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: transparent;
  color: var(--paper-2);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  outline: none;
}

.page-faq .filter-count {
  margin: 0 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss-2);
}

/* ---------- 问答条目 ---------- */

.page-faq .qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa-item {
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 43, 38, 0.74), rgba(10, 26, 42, 0.52));
  overflow: hidden;
}

.page-faq .qa-item[data-hidden="true"] {
  display: none;
}

.page-faq .qa-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.page-faq .qa-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa-item > summary::marker {
  content: "";
}

.page-faq .qa-item > summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa-item__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
  border: 1px solid rgba(228, 179, 63, 0.4);
  padding: 3px 6px;
  border-radius: var(--radius);
  white-space: nowrap;
}

.page-faq .qa-item__q {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .qa-item__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .qa-item__sign::before,
.page-faq .qa-item__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 180ms ease, opacity 180ms ease;
}

.page-faq .qa-item__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .qa-item__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .qa-item[open] .qa-item__sign::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa-item[open] > summary {
  border-bottom: 1px solid var(--line-2);
}

.page-faq .qa-item__a {
  padding: 14px 16px 16px;
  animation: faq-qa-reveal 180ms ease;
}

.page-faq .qa-item__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-2);
}

.page-faq .qa-item__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
}

@keyframes faq-qa-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 收尾 ---------- */

.page-faq .guide-cta {
  padding: 20px 18px;
  border: 1px solid var(--line-2);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-faq .guide-cta__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-2);
}

/* ---------- 自适应 ---------- */

@media (min-width: 620px) {
  .page-faq .route-map__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .route-map__node:nth-child(-n + 2) {
    border-top: none;
  }

  .page-faq .datalist__row {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 720px) {
  .page-faq .route-map__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .route-map__node {
    border-top: none;
    border-left: 1px solid var(--line);
  }

  .page-faq .route-map__node:first-child {
    border-left: none;
  }

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

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

@media (min-width: 880px) {
  .page-faq .split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .guide-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .guide-index {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .guide-index__link {
    padding: 9px 8px 9px 12px;
  }
}

@media (min-width: 1180px) {
  .page-faq .route-map__node {
    padding: 22px 20px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item__a {
    animation: none;
  }

  .page-faq .guide-index__link,
  .page-faq .filter-btn,
  .page-faq .qa-item__sign::before,
  .page-faq .qa-item__sign::after {
    transition: none;
  }
}