.page-faq {
  --faq-rail: 250px;
  --faq-offset: 132px;
  --faq-text-soft: #3a3129;
  background: var(--tb-cream);
  color: var(--tb-ink);
  font-family: var(--tb-font-body);
  padding-bottom: 24px;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--tb-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  padding: 20px 0 4px;
}

.page-faq .guide-hero__grid {
  display: grid;
  gap: 20px;
  align-items: start;
}

.page-faq .guide-hero__main {
  min-width: 0;
}

.page-faq .guide-hero__eyebrow {
  margin: 0 0 10px;
}

.page-faq .guide-hero__lede {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .guide-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .guide-hero__panel {
  background: var(--tb-panel);
  color: #F1F4FA;
  border: 1px solid rgba(216, 205, 184, 0.22);
  border-radius: var(--tb-radius);
  padding: 18px;
  box-shadow: var(--tb-shadow);
}

.page-faq .guide-metrics {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.14);
  border-radius: 2px;
  overflow: hidden;
}

.page-faq .guide-metrics__item {
  background: var(--tb-panel);
  padding: 12px 12px 14px;
  min-width: 0;
}

.page-faq .guide-metrics__num {
  display: block;
  font-family: var(--tb-font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--tb-lime);
  letter-spacing: -0.01em;
}

.page-faq .guide-metrics__num small {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: #9FB0C8;
  margin-left: 3px;
}

.page-faq .guide-metrics__cap {
  display: block;
  margin-top: 5px;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: #9FB0C8;
}

/* ---------- 主体布局 ---------- */
.page-faq .guide-body {
  padding: 28px 0 8px;
}

.page-faq .guide-layout {
  display: grid;
  gap: 20px;
  align-items: start;
}

/* 分类导航 */
.page-faq .guide-nav {
  background: var(--tb-paper);
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  padding: 12px;
  min-width: 0;
}

.page-faq .guide-nav__title {
  margin: 0 0 10px;
  padding: 0 4px;
}

.page-faq .guide-nav__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .guide-nav__item {
  flex: 0 0 auto;
}

.page-faq .guide-nav__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  min-height: 44px;
  border: 1px solid var(--tb-line);
  border-radius: 2px;
  background: var(--tb-cream);
  color: var(--tb-ink);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-faq .guide-nav__link:hover {
  border-color: var(--tb-orange);
  color: var(--tb-blue);
  transform: translateY(-2px);
}

.page-faq .guide-nav__idx {
  font-family: var(--tb-font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--tb-orange);
}

/* ---------- 问答区 ---------- */
.page-faq .guide-qa {
  display: grid;
  gap: 30px;
  min-width: 0;
}

.page-faq .guide-block {
  padding-top: 22px;
  border-top: 1px solid var(--tb-line);
  scroll-margin-top: var(--faq-offset);
  min-width: 0;
}

.page-faq .guide-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .guide-block__head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.page-faq .guide-block__num {
  flex: none;
  font-family: var(--tb-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--tb-navy);
  border-radius: 2px;
  padding: 5px 7px;
  line-height: 1;
}

.page-faq .guide-block__sub {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--tb-slate);
}

/* 图片 */
.page-faq .guide-figure {
  margin: 0 0 18px;
  background: var(--tb-paper);
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  overflow: hidden;
}

.page-faq .guide-figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .guide-figure__img--alt {
  aspect-ratio: 10 / 7;
}

.page-faq .guide-figure__cap {
  padding: 9px 12px;
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--tb-slate);
  background: var(--tb-cream);
  border-top: 1px solid var(--tb-line);
}

/* 步骤条 */
.page-faq .guide-steps {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .guide-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  background: var(--tb-paper);
  border: 1px solid var(--tb-line);
  border-left: 3px solid var(--tb-navy);
  border-radius: var(--tb-radius);
  transition: border-left-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .guide-step:hover {
  border-left-color: var(--tb-orange);
  transform: translateX(2px);
  box-shadow: var(--tb-shadow);
}

.page-faq .guide-step__num {
  font-family: var(--tb-font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--tb-blue);
}

.page-faq .guide-step__body {
  min-width: 0;
}

.page-faq .guide-step__title {
  margin: 0 0 5px;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .guide-step__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--faq-text-soft);
}

/* 折叠问答 */
.page-faq .guide-qlist {
  border-top: 1px solid var(--tb-line);
}

.page-faq .guide-q {
  border-bottom: 1px solid var(--tb-line);
}

.page-faq .guide-q summary {
  position: relative;
  display: block;
  list-style: none;
  padding: 15px 46px 15px 0;
  min-height: 44px;
  font-size: 0.97rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--tb-ink);
  cursor: pointer;
  transition: color 0.2s ease;
}

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

.page-faq .guide-q summary:hover {
  color: var(--tb-blue);
}

.page-faq .guide-q summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--tb-line);
  border-radius: 2px;
  background: var(--tb-paper);
  color: var(--tb-navy);
  font-family: var(--tb-font-mono);
  font-size: 15px;
  line-height: 1;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .guide-q summary:hover::after {
  border-color: var(--tb-orange);
  color: var(--tb-orange);
}

.page-faq .guide-q[open] summary {
  color: var(--tb-navy);
}

.page-faq .guide-q[open] summary::after {
  content: "\2212";
  background: var(--tb-orange);
  border-color: var(--tb-orange);
  color: #fff;
}

.page-faq .guide-q__a {
  margin: 0 0 18px;
  max-width: 68ch;
  padding-right: 10px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--faq-text-soft);
}

/* 深色统计面板 */
.page-faq .guide-update-panel {
  margin: 20px 0 4px;
  padding: 20px;
  background: var(--tb-panel);
  color: #E8EDF6;
  border-radius: var(--tb-radius);
  box-shadow: var(--tb-shadow);
}

.page-faq .guide-update-panel__num {
  margin: 10px 0 8px;
  font-family: var(--tb-font-mono);
  font-size: clamp(2.1rem, 9vw, 3.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--tb-lime);
  letter-spacing: -0.02em;
}

.page-faq .guide-update-panel__num span {
  margin-left: 6px;
  font-size: 0.3em;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #9FB0C8;
}

.page-faq .guide-update-panel__text {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: #C7D3E6;
}

.page-faq .guide-update-panel__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .guide-update-panel__list li {
  padding: 4px 10px;
  border: 1px solid rgba(200, 240, 74, 0.36);
  border-radius: 999px;
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--tb-lime);
}

/* 联系卡 */
.page-faq .guide-contact {
  margin-top: 20px;
  padding: 18px;
  display: grid;
  gap: 14px;
  background: var(--tb-paper);
  border: 1px solid var(--tb-line);
  border-left: 3px solid var(--tb-orange);
  border-radius: var(--tb-radius);
}

.page-faq .guide-contact__item {
  min-width: 0;
}

.page-faq .guide-contact__val {
  display: block;
  margin-top: 5px;
  font-family: var(--tb-font-mono);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--tb-ink);
  word-break: break-word;
}

/* 延伸入口 */
.page-faq .guide-next {
  margin: 18px 0 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--tb-slate);
}

.page-faq .guide-next__link {
  color: var(--tb-blue);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 95, 224, 0.35);
}

.page-faq .guide-next__link:hover {
  color: var(--tb-orange);
  border-bottom-color: var(--tb-orange);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .guide-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }

  .page-faq .guide-step {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 16px;
    padding: 16px 18px;
  }

  .page-faq .guide-step__num {
    font-size: 1.8rem;
  }
}

@media (min-width: 900px) {
  .page-faq .guide-hero {
    padding: 32px 0 8px;
  }

  .page-faq .guide-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 32px;
  }

  .page-faq .guide-hero__panel {
    padding: 20px;
  }

  .page-faq .guide-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 36px;
  }

  .page-faq .guide-nav {
    position: sticky;
    top: var(--faq-offset);
    padding: 14px 12px;
  }

  .page-faq .guide-nav__list {
    display: grid;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .guide-nav__link {
    border-color: transparent;
    background: transparent;
    white-space: normal;
  }

  .page-faq .guide-nav__link:hover {
    background: var(--tb-cream);
    border-color: var(--tb-line);
    transform: none;
  }

  .page-faq .guide-block {
    padding-top: 26px;
  }

  .page-faq .guide-qa {
    gap: 34px;
  }
}

@media (min-width: 1100px) {
  .page-faq {
    --faq-rail: 268px;
  }

  .page-faq .guide-q summary {
    font-size: 1rem;
  }

  .page-faq .guide-q__a {
    font-size: 0.95rem;
  }
}

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

  .page-faq .guide-nav__link:hover,
  .page-faq .guide-step:hover {
    transform: none;
  }
}