.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 30px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin: 22px 0 4px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(30px, 6vw, 70px) 0 clamp(26px, 4.4vw, 50px);
  background:
    radial-gradient(680px 360px at 88% 0%, rgba(34, 232, 200, .16), transparent 68%),
    radial-gradient(520px 300px at 4% 24%, rgba(255, 138, 61, .09), transparent 70%);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  max-width: 15em;
  font-family: var(--font-head);
  font-size: clamp(32px, 6.4vw, 54px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--paper);
}

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

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 三步总览 ---------- */
.page-faq .overview-figure {
  margin: 0 0 clamp(24px, 3.6vw, 40px);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-faq .overview-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .overview-step {
  position: relative;
  padding: 26px 22px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--paper);
  color: var(--paper-ink);
  box-shadow: var(--shadow-paper);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .overview-step:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-faq .overview-step__num {
  position: absolute;
  top: 8px;
  right: 16px;
  font-family: var(--font-display);
  font-size: clamp(42px, 8vw, 64px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--panel);
  opacity: .16;
  pointer-events: none;
}

.page-faq .overview-step__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper-ink);
}

.page-faq .overview-step__title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .18s var(--ease);
}

.page-faq .overview-step__title a:hover {
  border-color: var(--cyan);
}

.page-faq .overview-step p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-ink);
  opacity: .78;
}

.page-faq .overview-step__time {
  display: inline-block;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: rgba(12, 38, 32, .1);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--panel);
}

/* ---------- 三步时间轴 ---------- */
.page-faq .steps-layout {
  display: grid;
  gap: 18px;
}

.page-faq .steps-rail {
  position: sticky;
  top: 82px;
  z-index: 6;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 10px;
  background: linear-gradient(180deg, var(--ink) 72%, rgba(6, 17, 14, 0));
  scrollbar-width: none;
}

.page-faq .steps-rail::-webkit-scrollbar {
  display: none;
}

.page-faq .steps-rail .toc__link {
  flex: 0 0 auto;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .steps-rail .toc__link:hover {
  color: var(--cyan);
  border-color: var(--line);
}

.page-faq .steps-rail .toc__link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .steps-flow {
  position: relative;
  display: grid;
  gap: 18px;
}

.page-faq .step-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--panel);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .step-card[open] {
  border-color: rgba(34, 232, 200, .5);
  background: var(--panel-deep);
}

.page-faq .step-card__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 16px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-card);
  transition: background-color .2s var(--ease);
}

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

.page-faq .step-card__summary:hover {
  background: rgba(34, 232, 200, .05);
}

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

.page-faq .step-card__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: .9;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  transition: color .2s var(--ease);
}

.page-faq .step-card[open] .step-card__num {
  color: var(--orange);
}

.page-faq .step-card__title {
  font-family: var(--font-head);
  font-size: clamp(17px, 2.3vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .step-card__time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .step-card__body {
  padding: 20px 20px 22px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .step-card__body p {
  margin: 0 0 1em;
}

.page-faq .step-card__body p:last-child {
  margin-bottom: 0;
}

.page-faq .step-card__media {
  margin: 20px 0 18px;
  border-radius: 14px;
  overflow: hidden;
}

.page-faq .step-card__result {
  margin-top: 20px;
  padding: 14px 16px;
  border-left: 3px solid var(--cyan);
  border-radius: 0 10px 10px 0;
  background: rgba(34, 232, 200, .07);
  font-size: 15px;
  color: var(--cyan-soft);
}

.page-faq .step-card__result strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 反馈 ---------- */
.page-faq .feedback-panel {
  display: grid;
  gap: 24px;
}

.page-faq .feedback-copy p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text);
  max-width: 62ch;
}

.page-faq .feedback-copy p:last-child {
  margin-bottom: 0;
}

.page-faq .feedback-demo {
  padding: 22px 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-card);
  background: var(--panel-deep);
}

.page-faq .feedback-demo__label {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .feedback-demo__bar {
  display: flex;
  justify-content: flex-end;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .feedback-demo__capsule {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 19px;
  border-radius: var(--radius-pill);
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 12px 26px -14px rgba(34, 232, 200, .9);
}

.page-faq .feedback-demo__capsule::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

/* ---------- 常见疑问 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: hidden;
  transition: border-color .2s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(34, 232, 200, .45);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  transition: background-color .18s var(--ease);
}

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

.page-faq .faq-item summary:hover {
  background: rgba(34, 232, 200, .05);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--orange);
}

.page-faq .faq-item__body {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-item__body p {
  margin: 0 0 .8em;
}

.page-faq .faq-item__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 后续入口 ---------- */
.page-faq .next-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-faq .next-card {
  display: block;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--paper);
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .next-card:hover {
  border-color: var(--cyan);
  background: var(--panel-deep);
  transform: translateY(-3px);
}

.page-faq .next-card small {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 700px) {
  .page-faq .overview-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .steps-flow {
    padding-left: 34px;
  }

  .page-faq .steps-flow::before {
    content: "";
    position: absolute;
    left: 11px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan) 0%, rgba(34, 232, 200, .07) 100%);
  }

  .page-faq .step-card::before {
    content: "";
    position: absolute;
    left: -28px;
    top: 27px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--cyan);
    border: 2px solid var(--orange);
  }
}

@media (min-width: 760px) {
  .page-faq .feedback-panel {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
    align-items: start;
  }

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

@media (min-width: 980px) {
  .page-faq .steps-layout {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

  .page-faq .steps-rail {
    position: sticky;
    top: 96px;
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 0;
    background: none;
  }

  .page-faq .steps-rail .toc__link {
    border-radius: 10px;
    padding: 9px 12px;
  }

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

@media (max-width: 540px) {
  .page-faq .step-card__summary {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .page-faq .step-card__time {
    grid-column: 2;
    justify-self: start;
    margin-top: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .overview-step:hover,
  .page-faq .next-card:hover {
    transform: none;
  }
}
</main>