.page-faq {
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 22px 0 44px;
  border-bottom: var(--hair);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -26%;
  top: -42%;
  width: 78%;
  height: 175%;
  background: var(--ochre-pale);
  transform: rotate(7deg);
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -58%;
  width: 46%;
  height: 110%;
  background: var(--indigo);
  opacity: 0.14;
  transform: rotate(7deg);
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 22px;
}

.page-faq .faq-kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 5px 11px;
  border: var(--hair);
  border-radius: var(--radius);
  background: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ochre);
  transform: rotate(-3deg);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 64px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-faq .faq-hero__intro {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
}

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

.page-faq .faq-hero__aside {
  background: var(--indigo);
  color: var(--paper-white);
  border: var(--hair);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  padding: 20px 18px;
}

.page-faq .faq-hero__aside-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--flag-yellow);
}

.page-faq .faq-hero__contact {
  margin: 0 0 16px;
  display: grid;
  gap: 2px;
}

.page-faq .faq-hero__contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre-pale);
}

.page-faq .faq-hero__contact dd {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  word-break: break-all;
}

.page-faq .faq-hero__contact dd:last-child {
  margin-bottom: 0;
}

.page-faq .faq-hero__aside-link {
  display: inline-block;
  font-size: 14px;
  color: var(--paper-white);
  text-decoration: none;
  border-bottom: 2px solid var(--flag-yellow);
  padding-bottom: 2px;
}

.page-faq .faq-hero__aside-link:hover,
.page-faq .faq-hero__aside-link:focus-visible {
  background: var(--ochre);
  box-shadow: 2px 2px 0 var(--flag-yellow);
}

/* ---------- 章节头 ---------- */
.page-faq .faq-section-head {
  margin-bottom: 24px;
}

.page-faq .faq-section-head h2 {
  margin: 8px 0 10px;
  font-family: var(--font-title);
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-section-head p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-triage {
  padding: 46px 0 8px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-step {
  position: relative;
  background: var(--paper-white);
  border: var(--hair);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 20px 18px 18px;
}

.page-faq .faq-step__no {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 8px;
  background: var(--ochre);
  color: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-faq .faq-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 19px;
  line-height: 1.35;
}

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

.page-faq .faq-figure {
  margin: 26px 0 0;
}

.page-faq .faq-figure .media-frame {
  border: var(--hair);
  box-shadow: var(--shadow-soft);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

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

/* ---------- 索引 + 问答 ---------- */
.page-faq .faq-groups {
  padding: 40px 0 8px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-faq .faq-index {
  background: var(--paper-white);
  border: var(--hair);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-faq .faq-index__groups {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-index__group {
  display: inline-block;
  padding: 6px 10px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ochre-pale);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background 150ms var(--ease), box-shadow 150ms var(--ease), transform 150ms var(--ease);
}

.page-faq .faq-index__group:hover,
.page-faq .faq-index__group:focus-visible {
  background: var(--ochre);
  color: var(--paper-white);
  box-shadow: 3px 3px 0 var(--ink);
  transform: translate(-1px, -1px);
}

.page-faq .faq-index__links {
  display: none;
}

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

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 38px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: var(--hair);
}

.page-faq .faq-group__letter {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  background: var(--indigo);
  color: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(21px, 3.6vw, 28px);
  line-height: 1.25;
}

/* ---------- 折叠卡片 ---------- */
.page-faq .faq-item {
  margin-bottom: 12px;
  background: var(--paper-white);
  border: var(--hair);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  scroll-margin-top: 96px;
  transition: box-shadow 150ms var(--ease), transform 150ms var(--ease);
}

.page-faq .faq-item[open] {
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 500;
}

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

.page-faq .faq-item__summary:hover {
  background: var(--ochre-pale);
}

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--flag-yellow);
  outline-offset: -4px;
}

.page-faq .faq-item__no {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-faq .faq-item__q {
  flex: 1;
  min-width: 0;
  font-size: 15.5px;
  line-height: 1.55;
}

.page-faq .faq-item__mark {
  flex: none;
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border: 2px solid var(--ink);
  background: transparent;
  transition: background 150ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  background: var(--flag-yellow);
}

.page-faq .faq-item[open] .faq-item__summary {
  border-bottom: 2px dashed var(--ochre-pale);
}

.page-faq .faq-item__body {
  padding: 14px 16px 18px;
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
}

/* ---------- 底部去向 ---------- */
.page-faq .faq-more {
  padding: 34px 0 60px;
}

.page-faq .faq-more__card {
  padding: 26px 20px;
}

.page-faq .faq-more__card h2 {
  margin: 8px 0 10px;
  font-family: var(--font-title);
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.25;
}

.page-faq .faq-more__card > p {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

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

.page-faq .faq-more__links a {
  display: block;
  padding: 12px 14px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.6;
  text-decoration: none;
  transition: background 150ms var(--ease), color 150ms var(--ease), box-shadow 150ms var(--ease), transform 150ms var(--ease);
}

.page-faq .faq-more__links a:hover,
.page-faq .faq-more__links a:focus-visible {
  background: var(--indigo);
  color: var(--paper-white);
  box-shadow: var(--shadow-soft);
  transform: translate(-2px, -2px);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 26px 0 56px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .faq-step + .faq-step::before {
    content: "";
    position: absolute;
    left: -22px;
    top: 46px;
    width: 22px;
    border-top: 2px dashed var(--ochre);
  }

  .page-faq .faq-item__summary {
    padding: 18px 20px;
  }

  .page-faq .faq-item__body {
    padding: 16px 20px 20px;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__body {
    grid-template-columns: minmax(0, 1.6fr) 300px;
    align-items: start;
    gap: 36px;
  }

  .page-faq .faq-hero__aside {
    margin-top: 6px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-triage {
    padding: 60px 0 12px;
  }

  .page-faq .faq-groups {
    padding: 54px 0 12px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    padding: 16px 14px;
  }

  .page-faq .faq-index__groups {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .page-faq .faq-index__group {
    border-color: transparent;
    background: transparent;
    padding: 7px 8px;
    font-size: 12px;
  }

  .page-faq .faq-index__group:hover,
  .page-faq .faq-index__group:focus-visible {
    border-color: var(--ink);
    box-shadow: none;
    transform: none;
  }

  .page-faq .faq-index__links {
    display: block;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 2px dashed var(--ochre-pale);
  }

  .page-faq .faq-index__link {
    display: flex;
    gap: 8px;
    padding: 6px 8px 6px 10px;
    border-left: 3px solid transparent;
    color: var(--ink);
    font-size: 13px;
    line-height: 1.5;
    text-decoration: none;
    transition: border-color 150ms var(--ease), background 150ms var(--ease);
  }

  .page-faq .faq-index__link span {
    flex: none;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--stone);
    padding-top: 1px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--ochre);
    background: var(--ochre-pale);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__group,
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__mark,
  .page-faq .faq-more__links a {
    transition: none;
  }
}