.page-faq {
  --faq-cut: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  --faq-rail-w: 210px;
  display: block;
  min-width: 0;
}

.page-faq .faq-crumb-sep {
  margin: 0 8px;
  color: var(--grid);
}

.page-faq .faq-crumb-cur {
  color: var(--cyan);
  letter-spacing: .04em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(30px, 5vw, 62px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 150%;
  background:
    radial-gradient(58% 52% at 80% 6%, rgba(0, 229, 255, .15), transparent 70%),
    radial-gradient(42% 42% at 8% 96%, rgba(255, 138, 61, .10), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(33px, 6.2vw, 64px);
  line-height: 1.05;
  letter-spacing: -.012em;
  margin: 12px 0 0;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 38em;
  color: var(--muted);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--grid);
  font-size: 14px;
  color: var(--muted);
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-hero__num {
  color: var(--cyan);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* ---------- 四栏目总览 ---------- */
.page-faq .faq-overview {
  padding: clamp(20px, 3.6vw, 44px) 0 clamp(10px, 2vw, 22px);
}

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

.page-faq .faq-card {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 22px 20px 20px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--grid);
  clip-path: var(--faq-cut);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-within {
  transform: translateY(-3px);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-faq .faq-card__idx {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-card__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-card__desc {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-card__link {
  align-self: flex-start;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-card__link:hover,
.page-faq .faq-card__link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 两栏正文 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(46px, 7vw, 92px);
}

.page-faq .faq-rail {
  align-self: start;
  padding-top: 14px;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-rail__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 10px;
  font-size: 13.5px;
  line-height: 1.3;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--text);
  background: rgba(0, 229, 255, .07);
  border-left-color: var(--cyan);
}

.page-faq .faq-rail__list .mono {
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-panels {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  min-width: 0;
}

.page-faq .faq-sec {
  min-width: 0;
  scroll-margin-top: 110px;
}

.page-faq .faq-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding-bottom: 13px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-sec__idx {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-sec__tag {
  margin-left: auto;
  padding: 3px 10px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--amber);
  background: rgba(255, 138, 61, .09);
  box-shadow: inset 0 0 0 1px rgba(255, 138, 61, .38);
  clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}

.page-faq .faq-sec__body > p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-sec__body strong {
  color: var(--text);
  font-weight: 600;
}

.page-faq .faq-note {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--grid);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-fold {
  margin-bottom: 10px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--grid);
  clip-path: var(--faq-cut);
  transition: box-shadow var(--dur) var(--ease);
}

.page-faq .faq-fold[open] {
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .42);
}

.page-faq .faq-fold summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-fold summary::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: -3px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-fold[open] summary::before {
  transform: rotate(45deg);
}

.page-faq .faq-fold summary:hover {
  color: var(--cyan);
}

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

.page-faq .faq-fold__content {
  padding: 0 18px 16px 41px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-fold__content p {
  margin: 0;
}

/* ---------- 版本对照轨迹 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: 10px;
  margin: 20px 0 22px;
}

.page-faq .faq-flow__node {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 15px 17px;
  background: var(--panel-2);
  box-shadow: inset 0 0 0 1px var(--grid);
  clip-path: var(--faq-cut);
}

.page-faq .faq-flow__node--accent {
  background:
    linear-gradient(180deg, rgba(0, 229, 255, .12), transparent 72%),
    var(--panel-2);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .5);
}

.page-faq .faq-flow__label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-flow__ver {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-flow__node--accent .faq-flow__ver {
  color: var(--cyan);
}

.page-faq .faq-flow__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-flow__mid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-flow__mid::before,
.page-faq .faq-flow__mid::after {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--grid);
}

.page-faq .faq-media {
  margin: 0 0 20px;
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* ---------- 费用档位 ---------- */
.page-faq .faq-tier {
  display: grid;
  gap: 12px;
  margin: 20px 0 4px;
}

.page-faq .faq-tier__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--grid);
  clip-path: var(--faq-cut);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-tier__card:hover,
.page-faq .faq-tier__card:focus-within {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1px var(--amber);
}

.page-faq .faq-tier__name {
  margin: 0;
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

.page-faq .faq-tier__card:hover .faq-tier__name,
.page-faq .faq-tier__card:focus-within .faq-tier__name {
  color: var(--amber);
}

.page-faq .faq-tier__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-tier__hint {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.68;
  color: var(--amber);
  transition: max-height var(--dur-slow) var(--ease), opacity var(--dur-slow) var(--ease),
    padding-top var(--dur-slow) var(--ease);
}

.page-faq .faq-tier__card:hover .faq-tier__hint,
.page-faq .faq-tier__card:focus-within .faq-tier__hint {
  max-height: 140px;
  opacity: 1;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 138, 61, .3);
}

/* ---------- 反馈步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 18px 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps__item {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--grid);
  clip-path: var(--faq-cut);
}

.page-faq .faq-steps__num {
  flex: none;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-steps__item h3 {
  margin: 0 0 5px;
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 18px 0 0;
  padding: 13px 16px;
  background: rgba(255, 138, 61, .07);
  box-shadow: inset 0 0 0 1px rgba(255, 138, 61, .35);
  clip-path: var(--faq-cut);
  font-size: 13px;
  color: var(--amber);
}

.page-faq .faq-path .mono {
  color: var(--amber);
  letter-spacing: .04em;
}

.page-faq .faq-path__arrow {
  color: rgba(255, 138, 61, .65);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-callout {
  margin: 18px 0 0;
  padding: 22px 20px;
  background:
    linear-gradient(180deg, rgba(0, 229, 255, .09), transparent 68%),
    var(--panel-2);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .4);
  clip-path: var(--faq-cut);
}

.page-faq .faq-callout__title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-callout__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-callout__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
}

.page-faq .faq-callout__text a:hover,
.page-faq .faq-callout__text a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-callout__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-overview__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  }

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

  .page-faq .faq-steps__item {
    flex-direction: column;
    gap: 10px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-overview__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

  .page-faq .faq-rail {
    position: sticky;
    top: 112px;
    padding-top: 0;
    padding-left: 18px;
    border-top: 0;
    border-left: 1px solid var(--grid);
  }

  .page-faq .faq-rail__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-rail__list a {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-tier__card,
  .page-faq .faq-fold,
  .page-faq .faq-fold summary::before,
  .page-faq .faq-tier__hint {
    transition: none;
  }

  .page-faq .faq-card:hover,
  .page-faq .faq-card:focus-within,
  .page-faq .faq-tier__card:hover,
  .page-faq .faq-tier__card:focus-within {
    transform: none;
  }
}