.page-faq {
  --faq-hair: 1px solid var(--hair);
  --faq-gap: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(60px, 8vw, 120px);
}

.page-faq #faq-steps,
.page-faq #faq-cards,
.page-faq #faq-check,
.page-faq #faq-help,
.page-faq .faq-cat {
  scroll-margin-top: calc(var(--topline) + 20px);
}

/* ── 开篇 ── */
.page-faq .faq-intro {
  padding-top: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(28px, 4vw, 56px);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(26px, 4.6vw, 48px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

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

.page-faq .faq-intro .eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-title {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(32px, 5.6vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-title::after {
  content: "";
  display: block;
  width: clamp(72px, 15%, 190px);
  height: 4px;
  margin-top: clamp(18px, 3vw, 30px);
  background: linear-gradient(75deg, var(--cyan) 0 44%, var(--gold) 44% 78%, var(--clay) 78% 100%);
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(24px, 4vw, 42px);
  padding-top: 18px;
  border-top: var(--faq-hair);
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--hair);
  transition: color var(--dur-1) var(--ease), background-color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ── 章节头 ── */
.page-faq .faq-chapter {
  position: relative;
  padding-top: clamp(48px, 7vw, 100px);
}

.page-faq .faq-chapter--spacious {
  padding-top: clamp(80px, 12vw, 160px);
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 14px;
  align-items: baseline;
  padding-bottom: 16px;
  margin-bottom: var(--faq-gap);
  border-bottom: var(--faq-hair);
}

.page-faq .faq-head .chapter-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-head .section-title {
  margin: 0;
}

.page-faq .faq-head-note {
  grid-column: 1 / -1;
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
}

/* ── 三步上手 ── */
.page-faq .faq-steps-grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-step-list {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  padding: clamp(20px, 2.6vw, 32px) clamp(18px, 2.4vw, 30px) clamp(18px, 2.2vw, 26px);
  background: var(--carbon);
  border-top: 4px solid var(--cyan);
  transition: background-color var(--dur-1) var(--ease);
}

.page-faq .faq-step--gold { border-top-color: var(--gold); }
.page-faq .faq-step--clay { border-top-color: var(--clay); }

.page-faq .faq-step:hover { background: var(--hl); }

.page-faq .faq-step-num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-step--gold .faq-step-num { color: var(--gold); }
.page-faq .faq-step--clay .faq-step-num { color: var(--clay); }

.page-faq .faq-step .sub-title {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-faq .faq-step .body-text {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-step-link {
  display: inline-block;
  padding-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
  transition: transform var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-faq .faq-step-link:hover,
.page-faq .faq-step-link:focus-visible {
  transform: translateX(3px);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-media {
  overflow: hidden;
  background: var(--slate);
  border: var(--faq-hair);
}

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

.page-faq .faq-media-note {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ── 六张步骤卡 ── */
.page-faq .faq-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: var(--faq-hair);
}

.page-faq .faq-card {
  padding: clamp(18px, 2.4vw, 28px) clamp(14px, 2vw, 24px);
  border-bottom: var(--faq-hair);
  transition: background-color var(--dur-1) var(--ease);
}

.page-faq .faq-card:hover { background: var(--hl); }

.page-faq .faq-card-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-faq .faq-card-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-card-judge {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
}

/* ── 折叠组件 ── */
.page-faq .faq-fold > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  transition: color var(--dur-1) var(--ease);
}

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

.page-faq .faq-fold > summary::after {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur-2) var(--ease);
}

.page-faq .faq-fold[open] > summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-fold > summary:hover,
.page-faq .faq-fold > summary:focus-visible {
  color: var(--magenta);
}

.page-faq .faq-fold .list-summary {
  max-width: 62ch;
  margin: 10px 0 0;
  color: var(--mist);
}

/* ── 常见疑问 ── */
.page-faq .faq-qa-grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-cat-list {
  display: grid;
  gap: clamp(26px, 3.4vw, 42px);
}

.page-faq .faq-cat-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-cat-tag {
  padding: 2px 7px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid var(--hair);
}

.page-faq .faq-fold--qa {
  border-bottom: var(--faq-hair);
}

.page-faq .faq-fold--qa > summary {
  display: flex;
  width: 100%;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  font-family: var(--font-text);
  font-size: 16px;
  letter-spacing: 0;
  color: var(--paper);
}

.page-faq .faq-fold--qa > summary::after {
  margin-left: auto;
}

.page-faq .faq-q {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-fold--qa .list-summary {
  margin: 0 0 16px;
  padding-left: 34px;
  color: var(--mist);
}

/* ── 排查清单 ── */
.page-faq .faq-check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--faq-hair);
}

.page-faq .faq-check {
  position: relative;
  border-bottom: var(--faq-hair);
}

.page-faq .faq-check-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}

.page-faq .faq-check-label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 4px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--dur-1) var(--ease);
}

.page-faq .faq-check-box {
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  background: transparent;
  border: 1px solid var(--mist);
  transition: background-color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-faq .faq-check-label:hover .faq-check-box {
  border-color: var(--cyan);
}

.page-faq .faq-check-input:checked + .faq-check-label .faq-check-box {
  background: var(--moss);
  border-color: var(--moss);
}

.page-faq .faq-check-input:checked + .faq-check-label .faq-check-text {
  color: var(--mist);
}

.page-faq .faq-check-input:focus-visible + .faq-check-label .faq-check-box {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ── 求助段 ── */
.page-faq .faq-help {
  padding: clamp(22px, 3vw, 38px);
  background: var(--hl);
  border: 1px solid var(--hair);
  border-left: 4px solid var(--cyan);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-faq .faq-help-main {
  min-width: 0;
}

.page-faq .faq-help .body-text {
  margin: 0 0 14px;
  color: var(--paper);
}

.page-faq .faq-help .body-text:last-of-type {
  margin-bottom: 22px;
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-help-side .sub-title {
  margin: 0 0 14px;
  color: var(--paper);
}

.page-faq .faq-help-list {
  display: grid;
  gap: 10px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-help-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-help-side .note {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-help-link {
  color: var(--cyan);
  font-size: 13px;
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}

.page-faq .faq-help-link:hover,
.page-faq .faq-help-link:focus-visible {
  border-bottom-color: var(--magenta);
  color: var(--magenta);
}

/* ── 响应式 ── */
@media (min-width: 760px) {
  .page-faq .faq-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-card:nth-child(odd) {
    border-right: var(--faq-hair);
  }

  .page-faq .faq-check-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-check:nth-child(odd) {
    border-right: var(--faq-hair);
  }

  .page-faq .faq-check:nth-child(odd) .faq-check-label {
    padding-right: 22px;
  }

  .page-faq .faq-check:nth-child(even) .faq-check-label {
    padding-left: 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-steps-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

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

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

  .page-faq .faq-steps-media {
    position: sticky;
    top: calc(var(--topline) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-card,
  .page-faq .faq-step-link,
  .page-faq .faq-fold > summary,
  .page-faq .faq-fold > summary::after,
  .page-faq .faq-check-box,
  .page-faq .faq-help-link {
    transition: none;
  }

  .page-faq .faq-step-link:hover,
  .page-faq .faq-step-link:focus-visible {
    transform: none;
  }

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