.page-faq {
  background: var(--yb-paper);
  color: var(--yb-ink-900);
  overflow-x: hidden;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: calc(var(--yb-content) + 36px);
  margin-inline: auto;
  padding: 24px 18px 76px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 18px;
  padding: 26px 20px 30px;
  background:
    linear-gradient(135deg, rgba(220, 227, 245, .95) 0%, rgba(247, 248, 251, .75) 54%, rgba(253, 231, 216, .85) 100%);
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius-lg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--yb-orange-600);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(28px, 7.2vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--yb-indigo-900);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--yb-ink-500);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 22px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid rgba(27, 44, 99, .1);
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--yb-ink-500);
}

.page-faq .faq-hero__stats .yb-mono {
  font-size: 21px;
  font-weight: 700;
  color: var(--yb-orange-500);
  letter-spacing: .02em;
}

/* ---------- 章节头 ---------- */
.page-faq .yb-section {
  margin-top: 52px;
}

.page-faq .yb-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--yb-line);
}

.page-faq .yb-section__index {
  padding: 2px 7px;
  font-size: 12px;
  color: var(--yb-orange-500);
  border: 1px solid rgba(242, 118, 46, .38);
  border-radius: 4px;
}

.page-faq .yb-section__title {
  margin: 0;
  font-size: clamp(21px, 4.8vw, 28px);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--yb-indigo-900);
}

.page-faq .yb-section__note {
  flex-basis: 100%;
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--yb-ink-500);
}

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius-lg);
  background: linear-gradient(140deg, var(--yb-indigo-100), var(--yb-paper));
  object-fit: cover;
}

.page-faq .faq-figure .yb-figure__cap {
  margin-top: 10px;
  padding-left: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--yb-ink-500);
  border-left: 2px solid var(--yb-orange-500);
}

/* ---------- 三步 ---------- */
.page-faq .faq-steps__list {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 18px 22px;
  background: #fff;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  box-shadow: var(--yb-shadow-1);
  transition: transform .18s var(--yb-ease), border-color .18s var(--yb-ease), box-shadow .18s var(--yb-ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  border-color: var(--yb-line-strong);
  box-shadow: var(--yb-shadow-2);
}

.page-faq .faq-step__num {
  display: inline-block;
  padding-bottom: 3px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--yb-orange-500);
  border-bottom: 2px solid var(--yb-orange-500);
}

.page-faq .faq-step__title {
  margin: 12px 0 0;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--yb-indigo-900);
}

.page-faq .faq-step__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--yb-ink-500);
}

.page-faq .faq-step__slip {
  margin: 14px 0 0;
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--yb-orange-600);
  background: var(--yb-orange-100);
  border-radius: 4px;
}

.page-faq .faq-step__slip span {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--yb-orange-600);
  opacity: .85;
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa__layout {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-faq .faq-index {
  padding: 16px 14px;
  background: linear-gradient(160deg, rgba(220, 227, 245, .62), rgba(247, 248, 251, .92));
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
}

.page-faq .faq-index__title {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--yb-indigo-500);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--yb-indigo-700);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 4px;
  transition: background .18s var(--yb-ease), border-color .18s var(--yb-ease);
}

.page-faq .faq-index__link .yb-mono {
  font-size: 11px;
  color: var(--yb-ink-500);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: #fff;
  border-left-color: var(--yb-orange-500);
  color: var(--yb-indigo-900);
}

.page-faq .faq-groups {
  display: grid;
  gap: 26px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 88px;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 800;
  color: var(--yb-indigo-900);
}

.page-faq .faq-group__code {
  padding: 1px 6px;
  font-size: 11px;
  color: var(--yb-green-500);
  background: var(--yb-green-100);
  border-radius: 3px;
}

.page-faq .faq-item {
  margin-top: 8px;
  background: #fff;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  overflow: hidden;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--yb-indigo-900);
  cursor: pointer;
  list-style: none;
  transition: background .18s var(--yb-ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--yb-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--yb-orange-500);
  transition: transform .12s var(--yb-ease);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.page-faq .faq-item summary:hover {
  background: rgba(220, 227, 245, .32);
}

.page-faq .faq-item__body {
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--yb-ink-500);
  animation: faqReveal .18s var(--yb-ease);
}

.page-faq .faq-item__body::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: 12px;
  background: var(--yb-line);
}

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

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 术语对照 ---------- */
.page-faq .faq-glossary__layout {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

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

.page-faq .faq-table-scroll {
  overflow-x: auto;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  background: #fff;
}

.page-faq .faq-terms {
  width: 100%;
  min-width: 470px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-terms__caption {
  padding: 12px 14px 6px;
  text-align: left;
  font-family: var(--yb-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--yb-ink-500);
}

.page-faq .faq-terms th {
  padding: 10px 14px;
  text-align: left;
  font-family: var(--yb-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--yb-ink-500);
  white-space: nowrap;
  border-bottom: 1px solid var(--yb-line-strong);
}

.page-faq .faq-terms td {
  padding: 12px 14px;
  line-height: 1.7;
  color: var(--yb-ink-900);
  vertical-align: top;
  border-bottom: 1px solid var(--yb-line);
}

.page-faq .faq-terms tbody tr:nth-child(even) {
  background: rgba(220, 227, 245, .42);
}

.page-faq .faq-terms tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-terms__code {
  font-family: var(--yb-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--yb-indigo-500);
  white-space: nowrap;
}

/* ---------- 常见卡点 ---------- */
.page-faq .faq-trouble__grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-faq .faq-trouble__card {
  padding: 20px 18px;
  background: #fff;
  border: 1px solid var(--yb-line);
  border-top: 3px solid var(--tone, var(--yb-indigo-500));
  border-radius: var(--yb-radius);
}

.page-faq .faq-trouble__card:nth-child(1) { --tone: var(--yb-orange-500); }
.page-faq .faq-trouble__card:nth-child(2) { --tone: var(--yb-green-500); }
.page-faq .faq-trouble__card:nth-child(3) { --tone: var(--yb-indigo-500); }

.page-faq .faq-trouble__card-title {
  margin: 0;
  font-size: 16px;
  line-height: 1.55;
  font-weight: 800;
  color: var(--yb-indigo-900);
}

.page-faq .faq-trouble__steps {
  margin: 12px 0 0;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--yb-ink-500);
}

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

.page-faq .faq-trouble__steps li::marker {
  font-family: var(--yb-mono);
  color: var(--tone, var(--yb-indigo-500));
}

/* ---------- 联系收束 ---------- */
.page-faq .faq-help__panel {
  display: grid;
  gap: 24px;
  margin-top: 26px;
  padding: 28px 20px;
  border-radius: var(--yb-radius-lg);
  background:
    linear-gradient(152deg, var(--yb-indigo-900) 0%, var(--yb-indigo-700) 58%, #243a7d 100%);
  color: #fff;
}

.page-faq .faq-help__eyebrow {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--yb-orange-500);
}

.page-faq .faq-help__title {
  margin: 10px 0 0;
  font-size: clamp(21px, 4.6vw, 26px);
  line-height: 1.35;
  font-weight: 800;
  color: #fff;
}

.page-faq .faq-help__lead {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .78);
}

.page-faq .faq-help__side {
  padding: 18px 16px;
  background: var(--yb-glass);
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: var(--yb-radius);
}

.page-faq .faq-help__side-title {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--yb-indigo-700);
}

.page-faq .faq-help__prep {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yb-ink-900);
}

.page-faq .faq-help__prep li {
  position: relative;
  padding-left: 16px;
}

.page-faq .faq-help__prep li + li {
  margin-top: 4px;
}

.page-faq .faq-help__prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--yb-green-500);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-wrap {
    padding: 34px 30px 92px;
  }

  .page-faq .faq-hero {
    padding: 34px 30px 38px;
  }

  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-trouble__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
    align-items: start;
    gap: 30px;
    padding: 34px 30px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-wrap {
    padding: 40px 40px 104px;
  }

  .page-faq .faq-qa__layout {
    grid-template-columns: 226px minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 84px;
  }

  .page-faq .faq-glossary__layout {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-glossary__figure {
    margin-top: 0;
  }

  .page-faq .faq-table-scroll {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-item__body {
    animation: none;
  }
}