.page-faq {
  --faq-rail: 248px;
}

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

.page-faq [id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 44px;
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(180deg, rgba(17, 19, 24, .045) 0 1px, transparent 1px 34px),
    radial-gradient(120% 80% at 92% -10%, rgba(184, 245, 236, .72), rgba(184, 245, 236, 0) 62%),
    linear-gradient(180deg, rgba(245, 245, 240, 1), rgba(232, 232, 224, .55));
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
}

.page-faq .faq-hero .lead {
  max-width: 48ch;
  color: var(--graphite);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 28px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}

.page-faq .faq-hero__stat dd {
  margin: 5px 0 0;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
}

/* ---------- 切角图框 ---------- */

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

.page-faq .faq-figure .figure__frame {
  padding: 8px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-faq .faq-figure .figure__frame img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--graphite);
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-flow__figure {
  margin-bottom: 4px;
}

/* ---------- 主布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: 30px;
}

.page-faq .faq-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-side__card {
  padding: 16px 16px 18px;
  background: var(--paper-2);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-side__card--band {
  border-left-color: var(--amber);
}

.page-faq .faq-side__title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--graphite);
}

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

.page-faq .faq-side__list a {
  display: block;
  padding: 9px 10px;
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--line);
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  background: var(--cyan-soft);
  padding-left: 16px;
  outline: none;
}

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

.page-faq .faq-chip {
  display: inline-block;
  padding: 6px 11px 6px 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  background: var(--amber-soft);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 9px 100%, 0 calc(100% - 9px));
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: var(--amber);
  outline: none;
}

.page-faq .faq-side__hint {
  margin: 14px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--amber);
  font-size: 12px;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 问答流 ---------- */

.page-faq .faq-flow__title {
  margin: 0 0 8px;
  font-size: clamp(24px, 5vw, 30px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-flow__lead {
  margin: 0 0 18px;
  font-size: 15px;
  color: var(--graphite);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px;
  margin-bottom: 22px;
  background: var(--paper-2);
  border: 1px dashed var(--line-strong);
}

.page-faq .faq-filter__btn {
  appearance: none;
  font: inherit;
  font-size: 13px;
  line-height: 1.4;
  padding: 7px 13px;
  color: var(--graphite);
  background: var(--paper);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-filter__btn:hover {
  border-color: var(--cyan-deep);
  color: var(--ink);
}

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

.page-faq .faq-filter__btn.is-active,
.page-faq .faq-filter__btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-acc {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--graphite);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-acc:hover {
  border-left-color: var(--cyan-deep);
}

.page-faq .faq-acc[open] {
  border-left-color: var(--cyan);
  background-image: linear-gradient(90deg, rgba(184, 245, 236, .62), rgba(245, 245, 240, 0) 52%);
}

.page-faq .faq-acc__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-acc__summary::after {
  content: "";
  flex: 0 0 auto;
  align-self: center;
  width: 9px;
  height: 9px;
  margin-left: auto;
  border-right: 2px solid var(--cyan-deep);
  border-bottom: 2px solid var(--cyan-deep);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-acc[open] .faq-acc__summary::after {
  transform: rotate(-135deg);
}

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

.page-faq .faq-acc__q {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-acc__meta {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan-deep);
}

.page-faq .faq-acc__body {
  padding: 0 18px 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-acc__body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--graphite);
}

/* ---------- 四类玩法 ---------- */

.page-faq .faq-routes {
  display: grid;
  gap: 16px;
}

.page-faq .faq-route {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--paper);
  border-top: 3px solid var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-faq .faq-route__index {
  margin: 0;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan-deep);
}

.page-faq .faq-route__title {
  margin: 10px 0 10px;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-route__desc {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-faq .faq-route__list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-faq .faq-route__list li {
  position: relative;
  padding-left: 17px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-faq .faq-route__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 2px;
  background: var(--amber);
}

.page-faq .faq-route__link {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--cyan);
}

.page-faq .faq-route__link:hover,
.page-faq .faq-route__link:focus-visible {
  color: var(--cyan-deep);
  outline: none;
}

/* ---------- 七档档位 ---------- */

.page-faq .faq-bands {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(216px, 1fr));
  gap: 12px;
}

.page-faq .faq-band {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  border-top: 3px solid var(--amber);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-band:hover,
.page-faq .faq-band:focus-visible {
  transform: translateY(-3px);
  border-top-color: var(--cyan);
  background: var(--cyan-soft);
  outline: none;
}

.page-faq .faq-band__num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-band__label {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--graphite);
}

.page-faq .faq-band__desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-faq .faq-band__code {
  margin-top: 4px;
  font-size: 12px;
  color: var(--cyan-deep);
}

/* ---------- 仍需帮助 ---------- */

.page-faq .faq-help {
  display: grid;
  gap: 26px;
}

.page-faq .faq-help .eyebrow {
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-faq .faq-help__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-help__copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-ink);
}

.page-faq .faq-help__panel {
  padding: 22px 20px;
  background: rgba(245, 245, 240, .06);
  border-left: 3px solid var(--amber);
}

.page-faq .faq-help__list {
  margin: 0 0 20px;
  display: grid;
  gap: 13px;
}

.page-faq .faq-help__row {
  display: grid;
  gap: 3px;
}

.page-faq .faq-help__row dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--on-ink-soft);
}

.page-faq .faq-help__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-help__aside {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  line-height: 1.75;
  color: var(--on-ink-soft);
}

.page-faq .faq-help__aside a {
  color: var(--cyan);
  text-decoration: underline;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-routes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
    gap: 40px;
  }

  .page-faq .faq-acc__q {
    font-size: 17px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero {
    padding: 46px 0 58px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 1.02fr .98fr;
    gap: 52px;
    align-items: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-routes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-faq .faq-acc__summary {
    flex-wrap: wrap;
    gap: 6px 10px;
  }

  .page-faq .faq-acc__meta {
    order: 2;
    width: 100%;
  }

  .page-faq .faq-acc__summary::after {
    order: 1;
  }

  .page-faq .faq-band__num {
    font-size: 26px;
  }
}