.page-faq {
  --faq-panel-bg: linear-gradient(180deg, rgba(14, 22, 38, .92), rgba(7, 11, 20, .92));
  --faq-body-text: rgba(244, 247, 255, .8);
  background: var(--ink);
  color: var(--white);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 44px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(47, 123, 255, .32), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__annot {
  display: none;
  writing-mode: vertical-rl;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--steel);
}

.page-faq .faq-hero__lead .eyebrow {
  color: var(--blue-soft);
  margin: 0 0 12px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.4vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: -.04em;
  margin: 0 0 16px;
  max-width: 16em;
}

.page-faq .faq-hero .lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-body-text);
  max-width: 52ch;
}

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

.page-faq .faq-hero__board {
  border: 1px solid var(--line-strong);
  background: linear-gradient(155deg, rgba(47, 123, 255, .18), rgba(14, 22, 38, .94) 60%);
  padding: 18px;
  display: grid;
  gap: 16px;
}

.page-faq .faq-hero__board-title {
  margin: 0;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--blue-soft);
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-faq .faq-metric {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-faq .faq-metric__value {
  font-size: 20px;
  line-height: 1.05;
  color: var(--orange);
}

.page-faq .faq-metric__label {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--steel);
}

.page-faq .faq-hero__status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  color: var(--steel);
}

/* 分类索引带 */
.page-faq .faq-index {
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__inner {
  display: flex;
  gap: 8px;
  padding-top: 12px;
  padding-bottom: 12px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--white);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .18s ease, color .18s ease, background .18s ease;
}

.page-faq .faq-chip .mono {
  font-size: 11px;
  color: var(--steel);
  transition: color .18s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

.page-faq .faq-chip:hover .mono,
.page-faq .faq-chip:focus-visible .mono {
  color: var(--orange-soft);
}

/* 目录轨道 + 答案面板 */
.page-faq .faq-layout {
  display: grid;
  gap: 8px;
  padding-top: 32px;
  padding-bottom: 56px;
}

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

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--steel);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 8px 9px 0;
  color: var(--faq-body-text);
  font-size: 13.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .faq-rail__list a .mono {
  font-size: 11px;
  color: var(--steel);
  transition: color .18s ease;
}

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

.page-faq .faq-rail__list a:hover .mono,
.page-faq .faq-rail__list a:focus-visible .mono {
  color: var(--orange);
}

.page-faq .faq-rail__hint {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--steel);
}

/* 分组 */
.page-faq .faq-group {
  padding: 30px 0 36px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 76px;
}

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

.page-faq .faq-group__index {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-faq .faq-group h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 4.6vw, 2rem);
  line-height: 1.18;
  letter-spacing: -.03em;
  margin: 0 0 10px;
}

.page-faq .faq-group__lede {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-body-text);
  max-width: 58ch;
}

/* 步骤条 */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 11px 14px 11px 11px;
  border: 1px solid var(--line);
  background: rgba(14, 22, 38, .62);
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(244, 247, 255, .88);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.7;
  color: var(--blue-soft);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--ink-3);
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.65;
  color: var(--steel);
}

/* 问答条目 */
.page-faq .qa {
  border: 1px solid var(--line);
  background: var(--faq-panel-bg);
  margin-bottom: 10px;
  transition: border-color .18s ease;
}

.page-faq .qa:hover {
  border-color: var(--line-strong);
}

.page-faq .qa[open] {
  border-color: rgba(255, 106, 26, .55);
}

.page-faq .qa summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 15px;
  list-style: none;
  cursor: pointer;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--white);
  transition: color .18s ease;
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 16px;
  color: var(--blue-soft);
  transition: color .18s ease;
}

.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-faq .qa__body {
  padding: 12px 15px 15px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--faq-body-text);
}

.page-faq .qa__body p {
  margin: 0 0 8px;
}

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

.page-faq .faq-link {
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(143, 194, 255, .4);
  transition: color .18s ease, border-color .18s ease;
}

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

/* 联系信息 */
.page-faq .faq-contact {
  display: grid;
  gap: 14px;
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(140deg, rgba(47, 123, 255, .16), rgba(14, 22, 38, .92) 62%);
}

.page-faq .faq-contact__item {
  min-width: 0;
  border-left: 2px solid var(--orange);
  padding-left: 12px;
}

.page-faq .faq-contact__label {
  margin: 0 0 5px;
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--steel);
}

.page-faq .faq-contact__value {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__hint {
  margin: 12px 0 0;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--steel);
}

/* 底部延伸 */
.page-faq .faq-next {
  border-top: 1px solid var(--line-strong);
  background: var(--ink-2);
  padding: 36px 0 48px;
}

.page-faq .faq-next__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.15rem, 3.4vw, 1.55rem);
  letter-spacing: -.02em;
  line-height: 1.25;
  margin: 0 0 18px;
}

.page-faq .faq-next__links {
  display: grid;
  gap: 10px;
}

.page-faq .faq-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  color: var(--white);
  font-size: 13.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color .18s ease, color .18s ease, transform .18s ease;
}

.page-faq .faq-next__link .mono {
  color: var(--blue-soft);
  font-size: 14px;
  transition: color .18s ease;
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
  transform: translateX(2px);
}

.page-faq .faq-next__link:hover .mono,
.page-faq .faq-next__link:focus-visible .mono {
  color: var(--orange);
}

/* 中等宽度 */
@media (min-width: 640px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

/* 桌面端 */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 52px 0 60px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 26px minmax(0, 1.2fr) minmax(290px, .82fr);
    column-gap: 34px;
    align-items: start;
  }

  .page-faq .faq-hero__annot {
    display: block;
    padding-top: 6px;
  }

  .page-faq .faq-hero__board {
    padding: 20px;
  }

  .page-faq .faq-metric__value {
    font-size: 22px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    column-gap: 44px;
    padding-top: 44px;
    padding-bottom: 72px;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 28px;
    align-self: start;
    padding-left: 16px;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-group {
    padding: 38px 0 42px;
  }

  .page-faq .faq-group h2 {
    max-width: 24em;
  }

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

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

/* 宽屏 */
@media (min-width: 1120px) {
  .page-faq .faq-hero h1 {
    font-size: clamp(2.6rem, 4.6vw, 3.9rem);
  }

  .page-faq .faq-hero .lede {
    font-size: 16px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
  }

  .page-faq .faq-metric__value {
    font-size: 24px;
  }
}