.page-faq {
  --faq-line: rgba(36, 56, 77, .9);
  --faq-glow: rgba(53, 225, 240, .10);
}

.page-faq [class*="span-"] {
  min-width: 0;
}

.page-faq .faq-crumb {
  padding: 24px 0 0;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 18px 0 34px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 58%;
  height: 170%;
  background: radial-gradient(closest-side, var(--faq-glow), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  row-gap: 32px;
  column-gap: 24px;
  align-items: start;
}

.page-faq .faq-hero__copy {
  max-width: 720px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 52px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.005em;
  color: var(--white);
  margin: 14px 0 18px;
}

.page-faq .faq-hero__lead {
  max-width: 620px;
  margin: 0;
  color: var(--mute);
  font-size: var(--fs-body);
  line-height: 1.78;
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 36px;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-stats__item {
  min-width: 76px;
}

.page-faq .faq-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-stats__num--cyan {
  color: var(--cyan);
}

.page-faq .faq-stats__num--gold {
  color: var(--gold);
}

.page-faq .faq-stats__label {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mute);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
}

.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 40px;
  height: 40px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
  pointer-events: none;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--edge);
  border-radius: var(--r);
  object-fit: cover;
}

.page-faq .faq-hero__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--mute);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  padding: 10px 0 72px;
  row-gap: 36px;
  column-gap: 24px;
  align-items: start;
}

.page-faq .faq-nav {
  position: relative;
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.page-faq .faq-nav__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid var(--edge);
  color: var(--mute);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-nav__list a:hover,
.page-faq .faq-nav__list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(53, 225, 240, .06);
}

.page-faq .faq-nav__n {
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .08em;
  color: var(--gold);
  flex: 0 0 auto;
}

/* ---------- 章节 ---------- */

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

.page-faq .faq-sec {
  padding-bottom: 40px;
  scroll-margin-top: 112px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: 44px;
  padding-top: 44px;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-sec__lead {
  max-width: 690px;
  margin: 16px 0 0;
  color: var(--mute);
  font-size: var(--fs-body);
  line-height: 1.8;
}

/* ---------- 步骤 ---------- */

.page-faq .steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .steps--plain {
  margin-top: 18px;
}

.page-faq .steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  background: var(--board);
  border: 1px solid var(--edge);
  border-radius: var(--r);
  transition: border-color .24s var(--ease);
}

.page-faq .steps__item:hover {
  border-color: rgba(53, 225, 240, .45);
}

.page-faq .steps--plain .steps__item {
  background: transparent;
  border: none;
  border-bottom: 1px dashed var(--faq-line);
  border-radius: 0;
  padding: 14px 0;
}

.page-faq .steps--plain .steps__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-faq .steps--plain .steps__item:hover {
  border-color: var(--faq-line);
}

.page-faq .steps__item + .steps__item::before {
  content: "";
  position: absolute;
  left: 40px;
  top: -16px;
  height: 16px;
  border-left: 1px dashed var(--edge);
  pointer-events: none;
}

.page-faq .steps--plain .steps__item + .steps__item::before {
  display: none;
}

.page-faq .steps__n {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .steps__title {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: var(--fs-sub);
  font-weight: 600;
  line-height: 1.35;
  color: var(--white);
}

.page-faq .steps__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
}

.page-faq .steps__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 240, .35);
}

.page-faq .steps__body a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 导出章节 ---------- */

.page-faq .faq-export__layout {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

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

.page-faq .faq-export__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--edge);
  border-radius: var(--r);
}

.page-faq .faq-export__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .02em;
  color: var(--mute);
}

/* ---------- 订阅章节 ---------- */

.page-faq .faq-sub__plate {
  position: relative;
  margin-top: 24px;
  padding: 26px 22px 20px;
  background: var(--board);
  border: 1px solid var(--edge);
  border-left: 3px solid var(--gold);
  border-radius: var(--r);
}

.page-faq .faq-sub__plate .tag {
  position: absolute;
  top: -10px;
  left: 18px;
}

/* ---------- 常见问题折叠组 ---------- */

.page-faq .faq-qa {
  margin-top: 22px;
  display: grid;
  gap: 9px;
}

.page-faq .faq-qa .fold {
  border-radius: var(--r);
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-help {
  margin-top: 24px;
  padding: 24px 22px 22px;
}

.page-faq .faq-help p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
}

.page-faq .faq-help__list .mono-label {
  flex: 0 0 auto;
  color: var(--cyan);
}

.page-faq .faq-help__val {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-faq .faq-help__note {
  padding-top: 14px;
  border-top: 1px dashed var(--faq-line);
  font-size: 14px;
  color: var(--mute);
}

.page-faq .faq-help__tail {
  margin-bottom: 0;
}

.page-faq .faq-help a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 240, .35);
}

.page-faq .faq-help a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */

@media (max-width: 899px) {
  .page-faq .faq-nav__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .page-faq .faq-nav__list a {
    border-left-width: 2px;
    padding: 10px 10px;
    font-size: 13px;
  }

  .page-faq .faq-stats {
    gap: 18px 26px;
  }
}

@media (max-width: 539px) {
  .page-faq .faq-nav__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-hero {
    padding: 10px 0 26px;
  }

  .page-faq .faq-sec + .faq-sec {
    margin-top: 34px;
    padding-top: 34px;
  }

  .page-faq .steps__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 15px;
  }

  .page-faq .steps__item + .steps__item::before {
    display: none;
  }

  .page-faq .steps__n {
    font-size: 15px;
    line-height: 1.2;
  }

  .page-faq .faq-sub__plate,
  .page-faq .faq-help {
    padding: 22px 16px 18px;
  }

  .page-faq .faq-stats__item {
    min-width: 66px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-nav__sticky {
    position: sticky;
    top: 104px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-export__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    align-items: start;
    gap: 32px;
  }

  .page-faq .faq-body {
    row-gap: 0;
  }
}