.page-faq {
  --faq-hair: rgba(44, 242, 208, 0.32);
  --faq-gap-s: 14px;
  --faq-gap-m: 20px;
  --faq-gap-l: 32px;
  --faq-section-gap: 64px;
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  padding: 28px 0 8px;
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--steel-blue);
  margin-bottom: 22px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-faq .breadcrumb a {
  color: var(--steel-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}

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

.page-faq .breadcrumb__sep {
  color: var(--ink-graphite);
}

.page-faq .faq-head__title {
  max-width: 20ch;
  transform: skewX(-3deg);
  transform-origin: left bottom;
  margin-bottom: 20px;
}

.page-faq .faq-head__lead {
  max-width: 62ch;
  color: var(--steel-blue);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-head__lead::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 26px;
  background: var(--red-track);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 7px 14px;
  border: 2px solid var(--ink-graphite);
  background: var(--ink-carbon);
  color: var(--mist-white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease-out),
    color var(--t-fast) var(--ease-out),
    box-shadow var(--t-fast) var(--ease-out),
    transform var(--t-fast) var(--ease-out);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--red-track);
  color: var(--cyan-neon);
  box-shadow: 3px 3px 0 var(--ink-graphite);
  transform: translate(-2px, -2px);
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-section {
  margin-top: var(--faq-section-gap);
}

.page-faq .faq-section .section-head {
  margin-bottom: 24px;
}

.page-faq .faq-section__note {
  max-width: 60ch;
  margin-top: 10px;
  color: var(--steel-blue);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-start__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap-l);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  counter-reset: faq-step;
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 22px 22px;
  background: var(--ink-carbon);
  border: 2px solid var(--ink-graphite);
  border-left: 4px solid var(--red-track);
}

.page-faq .faq-step:nth-child(2) {
  border-left-color: var(--orange-electric);
}

.page-faq .faq-step:nth-child(3) {
  border-left-color: var(--cyan-neon);
}

.page-faq .faq-step__num {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan-neon);
  margin-bottom: 10px;
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  color: var(--mist-white);
}

.page-faq .faq-step__text {
  margin: 0;
  color: var(--steel-blue);
  font-size: 15px;
  line-height: 1.72;
}

.page-faq .faq-media {
  margin: 0;
  border: 2px solid var(--ink-graphite);
  box-shadow: var(--shadow-hard);
  background: var(--ink-carbon);
  overflow: hidden;
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: contrast(1.08) saturate(0.9) brightness(0.92);
}

.page-faq .faq-media__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--ink-graphite);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel-blue);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 14px 16px;
  margin-bottom: 20px;
  background: var(--ink-carbon);
  border: 2px solid var(--ink-graphite);
  border-top: 3px solid var(--cyan-neon);
}

.page-faq .faq-filter__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--steel-blue);
  font-family: var(--font-mono);
}

.page-faq .faq-filter__input {
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  background: var(--ink-void);
  border: 2px solid var(--ink-graphite);
  color: var(--mist-white);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  transition: border-color var(--t-fast) var(--ease-out);
}

.page-faq .faq-filter__input::placeholder {
  color: var(--ink-graphite);
  color: #55606d;
}

.page-faq .faq-filter__input:focus-visible {
  outline: 2px solid var(--cyan-neon);
  outline-offset: 2px;
  border-color: var(--cyan-neon);
}

.page-faq .faq-filter__count {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-neon);
}

.page-faq .faq-filter__toggle {
  justify-self: start;
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap-s);
}

.page-faq .faq-list--flush {
  gap: 0;
}

.page-faq .faq-item {
  position: relative;
  background: var(--ink-carbon);
  border: 2px solid var(--ink-graphite);
  transition: border-color var(--t-fast) var(--ease-out);
}

.page-faq .faq-item:hover {
  border-color: #3c4653;
}

.page-faq .faq-item[open] {
  border-color: var(--cyan-neon);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--mist-white);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.55;
}

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

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan-neon);
  outline-offset: -4px;
}

.page-faq .faq-q__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 26px;
  padding: 0 8px;
  background: var(--ink-graphite);
  color: var(--steel-blue);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}

.page-faq .faq-item[open] .faq-q__num {
  background: var(--red-track);
  color: var(--mist-white);
}

.page-faq .faq-q__text {
  min-width: 0;
}

.page-faq .faq-q__icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

.page-faq .faq-q__icon::before,
.page-faq .faq-q__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan-neon);
  transition: transform var(--t-fast) var(--ease-out), opacity var(--t-fast) var(--ease-out);
}

.page-faq .faq-q__icon::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-q__icon::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

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

.page-faq .faq-a {
  padding: 14px 16px 18px;
  margin: 0 16px;
  border-top: 1px solid var(--ink-graphite);
}

.page-faq .faq-a p {
  margin: 0;
  color: var(--steel-blue);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap-l);
}

.page-faq .faq-media--tall img {
  aspect-ratio: 3 / 2;
}

/* ---------- 反馈区 ---------- */
.page-faq .faq-feedback {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap-m);
}

.page-faq .faq-template {
  padding: 20px;
  background: var(--ink-carbon);
  border: 2px solid var(--red-track);
  box-shadow: var(--shadow-hard-red);
  align-self: start;
}

.page-faq .faq-template__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange-electric);
  text-transform: uppercase;
}

.page-faq .faq-template__body {
  margin: 0 0 18px;
  padding: 14px;
  background: var(--ink-void);
  border: 1px dashed var(--ink-graphite);
  color: var(--mist-white);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  word-break: break-word;
}

/* ---------- 结尾联系 ---------- */
.page-faq .faq-cta__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap-l);
  padding: 26px 22px;
  background: var(--ink-carbon);
  border: 2px solid var(--ink-graphite);
  border-left: 6px solid var(--red-track);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-cta__body p {
  color: var(--steel-blue);
  font-size: 15px;
  line-height: 1.78;
  max-width: 58ch;
}

.page-faq .faq-cta__checklist {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-cta__checklist li {
  position: relative;
  padding-left: 22px;
  color: var(--mist-white);
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-cta__checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 2px;
  background: var(--cyan-neon);
}

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

.page-faq .faq-cta__facts {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 18px;
  background: var(--ink-void);
  border: 1px solid var(--ink-graphite);
  align-content: start;
}

.page-faq .faq-cta__fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel-blue);
  margin-bottom: 4px;
}

.page-faq .faq-cta__fact dd {
  margin: 0;
  color: var(--mist-white);
  font-size: 14px;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-cta__fact dd.mono {
  color: var(--cyan-neon);
  font-size: 13px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .faq-step {
    border-right: 0;
    clip-path: polygon(0 0, 100% 0, calc(100% - 18px) 100%, 0 100%);
    padding-right: 30px;
  }

  .page-faq .faq-step:last-child {
    border-right: 2px solid var(--ink-graphite);
    clip-path: none;
  }

  .page-faq .faq-filter {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 14px;
  }

  .page-faq .faq-filter__label {
    grid-column: 1 / -1;
  }

  .page-faq .faq-filter__count {
    justify-self: end;
  }

  .page-faq .faq-feedback {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 24px;
  }

  .page-faq .faq-list--flush .faq-item + .faq-item {
    border-top: 0;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq {
    --faq-section-gap: 96px;
    --faq-gap-l: 44px;
  }

  .page-faq .faq-head {
    padding-top: 40px;
  }

  .page-faq .faq-head__title {
    font-size: 44px;
  }

  .page-faq .faq-start__grid {
    grid-template-columns: 7fr 5fr;
    align-items: stretch;
  }

  .page-faq .faq-list--2col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 56px;
    align-items: start;
    position: relative;
  }

  .page-faq .faq-list--2col::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 6px;
    bottom: 6px;
    width: 0;
    border-left: 1px dashed var(--faq-hair);
    pointer-events: none;
  }

  .page-faq .faq-split {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-faq .faq-split .faq-list {
    order: 1;
  }

  .page-faq .faq-split .faq-media--tall {
    order: 2;
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-cta__panel {
    grid-template-columns: 7fr 5fr;
    padding: 40px 36px;
  }

  .page-faq .faq-section__note {
    font-size: 15px;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1200px) {
  .page-faq .faq-head__title {
    font-size: 52px;
  }

  .page-faq .faq-q {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .faq-a {
    padding: 16px 20px 20px;
    margin: 0 20px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .faq-q__num,
  .page-faq .faq-item,
  .page-faq .faq-q__icon::before,
  .page-faq .faq-q__icon::after {
    transition: none;
  }

  .page-faq .faq-head__title {
    transform: none;
  }
}
</main>