.page-faq {
  background: var(--snow);
  color: var(--navy);
  font-family: var(--font-cn);
  -webkit-text-size-adjust: 100%;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

.page-faq a {
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

/* ---------- 首屏 ---------- */
.page-faq .kb-hero {
  position: relative;
  padding: 20px 0 40px;
  background:
    radial-gradient(130% 90% at 100% 0%, rgba(47, 179, 163, .16), transparent 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(232, 117, 43, .12), transparent 62%),
    linear-gradient(180deg, var(--paper), var(--snow));
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .kb-hero .breadcrumb {
  margin-bottom: 22px;
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

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

.page-faq .kb-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--teal);
}

.page-faq .kb-hero__tag span {
  width: 18px;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--jade));
}

.page-faq .kb-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1.08;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--navy);
}

.page-faq .kb-hero h1 em {
  font-style: normal;
  display: inline-block;
  padding: 0 6px 2px;
  background: linear-gradient(180deg, transparent 62%, rgba(232, 117, 43, .32) 62%);
}

.page-faq .kb-hero__intro {
  margin: 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .kb-jump {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .kb-jump a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .72);
  color: var(--navy);
  font-size: 13px;
  text-decoration: none;
  box-shadow: var(--shadow-1);
}

.page-faq .kb-jump__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-faq .kb-jump a:hover,
.page-faq .kb-jump a:focus-visible {
  border-color: var(--orange);
  background: var(--paper);
  transform: translateY(-1px);
}

.page-faq .kb-jump a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-faq .kb-hero__fig {
  position: relative;
  margin: 0;
  padding: 10px 10px 36px;
  background: linear-gradient(158deg, var(--navy), var(--night));
  box-shadow: var(--shadow-2);
}

.page-faq .kb-hero__fig img {
  display: block;
  width: 100%;
  object-fit: cover;
  border-radius: 1px;
}

.page-faq .kb-hero__fig::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 15px;
  height: 3px;
  background: linear-gradient(90deg, var(--jade) 0 42%, var(--orange) 42% 70%, var(--red) 70% 100%);
}

.page-faq .kb-hero__fig figcaption {
  position: absolute;
  left: 12px;
  bottom: 22px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: rgba(246, 245, 239, .72);
}

/* ---------- 目录 + 问答主体 ---------- */
.page-faq .kb-shell {
  display: grid;
  gap: 26px;
  padding: 38px 0 44px;
}

.page-faq .kb-index {
  align-self: start;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 16px 14px;
  box-shadow: var(--shadow-1);
}

.page-faq .kb-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--teal);
}

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

.page-faq .kb-index__list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--navy);
  font-size: 14px;
  text-decoration: none;
}

.page-faq .kb-index__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal);
}

.page-faq .kb-index__list a:hover,
.page-faq .kb-index__list a:focus-visible {
  background: var(--stone);
  border-left-color: var(--orange);
}

.page-faq .kb-index__list a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -2px;
}

.page-faq .kb-index__tip {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.page-faq .kb-index__tip p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .kb-index__cta {
  display: block;
  text-align: center;
  padding: 9px 10px;
  background: var(--navy);
  color: var(--snow);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.page-faq .kb-index__cta:hover,
.page-faq .kb-index__cta:focus-visible {
  background: var(--orange);
  color: var(--night);
}

.page-faq .kb-index__cta:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ---------- 分组 ---------- */
.page-faq .kb-body > .kb-group {
  --cat: var(--teal);
  margin-bottom: 38px;
  scroll-margin-top: 90px;
}

.page-faq .kb-body > .kb-group:nth-of-type(1) { --cat: var(--orange); }
.page-faq .kb-body > .kb-group:nth-of-type(2) { --cat: var(--teal); }
.page-faq .kb-body > .kb-group:nth-of-type(3) { --cat: var(--navy); }
.page-faq .kb-body > .kb-group:nth-of-type(4) { --cat: var(--red); }
.page-faq .kb-body > .kb-group:nth-of-type(5) { --cat: var(--jade); }

.page-faq .kb-body > .kb-group:last-child {
  margin-bottom: 0;
}

.page-faq .kb-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--navy);
}

.page-faq .kb-group__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 6vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--cat);
}

.page-faq .kb-group__head h2 {
  margin: 0;
  font-size: clamp(19px, 4vw, 27px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--navy);
}

.page-faq .kb-group__note {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 步骤编号 ---------- */
.page-faq .kb-steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line-soft);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  transition: transform .18s ease, border-color .18s ease;
}

.page-faq .kb-steps li:hover {
  transform: translateY(-2px);
  border-color: var(--line);
}

.page-faq .kb-steps__n {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--stone);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
}

.page-faq .kb-steps h3 {
  margin: 0 0 4px;
  font-size: 15px;
  letter-spacing: -.01em;
  color: var(--navy);
}

.page-faq .kb-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .kb-steps a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(29, 127, 122, .4);
}

/* ---------- 问答卡片 ---------- */
.page-faq .kb-qa {
  display: grid;
  gap: 8px;
}

.page-faq .kb-qa__item {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  border-left: 3px solid var(--cat);
}

.page-faq .kb-qa__item summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 44px 14px 14px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .kb-qa__item summary::after {
  content: "";
  position: absolute;
  right: 17px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -7px;
  border-right: 2px solid var(--cat);
  border-bottom: 2px solid var(--cat);
  transform: rotate(45deg);
  transition: transform .2s ease;
}

.page-faq .kb-qa__item[open] summary::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.page-faq .kb-qa__item summary:hover {
  background: rgba(221, 227, 218, .45);
}

.page-faq .kb-qa__item summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

.page-faq .kb-qa__item[open] summary {
  background: linear-gradient(180deg, rgba(221, 227, 218, .55), transparent);
}

.page-faq .kb-qa__body {
  padding: 2px 16px 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .kb-qa__body p {
  margin: 0 0 10px;
}

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

.page-faq .kb-qa__body a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(29, 127, 122, .4);
}

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

/* ---------- 章节配图 ---------- */
.page-faq .kb-media {
  margin: 0 0 20px;
  padding: 8px;
  background: linear-gradient(150deg, var(--navy), var(--night));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-2);
}

.page-faq .kb-media img {
  display: block;
  width: 100%;
  object-fit: cover;
}

/* ---------- 联系协助 ---------- */
.page-faq .kb-help {
  position: relative;
  overflow: hidden;
  padding: 26px 20px 28px;
  background: linear-gradient(150deg, var(--navy), var(--night) 78%);
  color: var(--snow);
  scroll-margin-top: 90px;
}

.page-faq .kb-help::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--jade), var(--orange) 55%, var(--red));
}

.page-faq .kb-help h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 4.4vw, 29px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--snow);
}

.page-faq .kb-help > p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(246, 245, 239, .78);
}

.page-faq .kb-help__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-help__list li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(246, 245, 239, .14);
  font-size: 14px;
  color: var(--snow);
  word-break: break-word;
}

.page-faq .kb-help__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--jade);
  padding-top: 3px;
}

.page-faq .kb-help__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--orange);
  color: var(--night);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.page-faq .kb-help__cta:hover,
.page-faq .kb-help__cta:focus-visible {
  background: var(--jade);
  color: var(--night);
}

.page-faq .kb-help__cta:focus-visible {
  outline: 2px solid var(--snow);
  outline-offset: 3px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .kb-hero {
    padding: 26px 0 52px;
  }

  .page-faq .kb-hero__grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 44px;
    align-items: center;
  }

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

  .page-faq .kb-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 36px;
    padding: 48px 0 56px;
  }

  .page-faq .kb-index {
    position: sticky;
    top: 92px;
    padding: 18px 16px;
  }

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

  .page-faq .kb-help {
    padding: 34px 32px 36px;
  }

  .page-faq .kb-media {
    margin-bottom: 24px;
  }
}

@media (min-width: 1060px) {
  .page-faq .kb-shell {
    grid-template-columns: 262px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .kb-group {
    margin-bottom: 46px;
  }

  .page-faq .kb-qa__body {
    padding-left: 20px;
    padding-right: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }

  .page-faq .kb-steps li:hover,
  .page-faq .kb-jump a:hover {
    transform: none;
  }
}

.page-faq {
  background: var(--snow);
  color: var(--navy);
  font-family: var(--font-cn);
  -webkit-text-size-adjust: 100%;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

.page-faq a {
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

/* ---------- 首屏 ---------- */
.page-faq .kb-hero {
  position: relative;
  padding: 20px 0 40px;
  background:
    radial-gradient(130% 90% at 100% 0%, rgba(47, 179, 163, .16), transparent 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(232, 117, 43, .12), transparent 62%),
    linear-gradient(180deg, var(--paper), var(--snow));
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .kb-hero .breadcrumb {
  margin-bottom: 22px;
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

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

.page-faq .kb-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--teal);
}

.page-faq .kb-hero__tag span {
  width: 18px;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--jade));
}

.page-faq .kb-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1.08;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--navy);
}

.page-faq .kb-hero h1 em {
  font-style: normal;
  display: inline-block;
  padding: 0 6px 2px;
  background: linear-gradient(180deg, transparent 62%, rgba(232, 117, 43, .32) 62%);
}

.page-faq .kb-hero__intro {
  margin: 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .kb-jump {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .kb-jump a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .72);
  color: var(--navy);
  font-size: 13px;
  text-decoration: none;
  box-shadow: var(--shadow-1);
}

.page-faq .kb-jump__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-faq .kb-jump a:hover,
.page-faq .kb-jump a:focus-visible {
  border-color: var(--orange);
  background: var(--paper);
  transform: translateY(-1px);
}

.page-faq .kb-jump a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-faq .kb-hero__fig {
  position: relative;
  margin: 0;
  padding: 10px 10px 36px;
  background: linear-gradient(158deg, var(--navy), var(--night));
  box-shadow: var(--shadow-2);
}

.page-faq .kb-hero__fig img {
  display: block;
  width: 100%;
  object-fit: cover;
  border-radius: 1px;
}

.page-faq .kb-hero__fig::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 15px;
  height: 3px;
  background: linear-gradient(90deg, var(--jade) 0 42%, var(--orange) 42% 70%, var(--red) 70% 100%);
}

.page-faq .kb-hero__fig figcaption {
  position: absolute;
  left: 12px;
  bottom: 22px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: rgba(246, 245, 239, .72);
}

/* ---------- 目录 + 问答主体 ---------- */
.page-faq .kb-shell {
  display: grid;
  gap: 26px;
  padding: 38px 0 44px;
}

.page-faq .kb-index {
  align-self: start;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 16px 14px;
  box-shadow: var(--shadow-1);
}

.page-faq .kb-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--teal);
}

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

.page-faq .kb-index__list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--navy);
  font-size: 14px;
  text-decoration: none;
}

.page-faq .kb-index__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal);
}

.page-faq .kb-index__list a:hover,
.page-faq .kb-index__list a:focus-visible {
  background: var(--stone);
  border-left-color: var(--orange);
}

.page-faq .kb-index__list a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -2px;
}

.page-faq .kb-index__tip {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.page-faq .kb-index__tip p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .kb-index__cta {
  display: block;
  text-align: center;
  padding: 9px 10px;
  background: var(--navy);
  color: var(--snow);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.page-faq .kb-index__cta:hover,
.page-faq .kb-index__cta:focus-visible {
  background: var(--orange);
  color: var(--night);
}

.page-faq .kb-index__cta:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ---------- 分组 ---------- */
.page-faq .kb-body > .kb-group {
  --cat: var(--teal);
  margin-bottom: 38px;
  scroll-margin-top: 90px;
}

.page-faq .kb-body > .kb-group:nth-of-type(1) { --cat: var(--orange); }
.page-faq .kb-body > .kb-group:nth-of-type(2) { --cat: var(--teal); }
.page-faq .kb-body > .kb-group:nth-of-type(3) { --cat: var(--navy); }
.page-faq .kb-body > .kb-group:nth-of-type(4) { --cat: var(--red); }
.page-faq .kb-body > .kb-group:nth-of-type(5) { --cat: var(--jade); }

.page-faq .kb-body > .kb-group:last-child {
  margin-bottom: 0;
}

.page-faq .kb-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--navy);
}

.page-faq .kb-group__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 6vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--cat);
}

.page-faq .kb-group__head h2 {
  margin: 0;
  font-size: clamp(19px, 4vw, 27px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--navy);
}

.page-faq .kb-group__note {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 步骤编号 ---------- */
.page-faq .kb-steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line-soft);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  transition: transform .18s ease, border-color .18s ease;
}

.page-faq .kb-steps li:hover {
  transform: translateY(-2px);
  border-color: var(--line);
}

.page-faq .kb-steps__n {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--stone);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
}

.page-faq .kb-steps h3 {
  margin: 0 0 4px;
  font-size: 15px;
  letter-spacing: -.01em;
  color: var(--navy);
}

.page-faq .kb-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .kb-steps a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(29, 127, 122, .4);
}

/* ---------- 问答卡片 ---------- */
.page-faq .kb-qa {
  display: grid;
  gap: 8px;
}

.page-faq .kb-qa__item {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  border-left: 3px solid var(--cat);
}

.page-faq .kb-qa__item summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 44px 14px 14px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .kb-qa__item summary::after {
  content: "";
  position: absolute;
  right: 17px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -7px;
  border-right: 2px solid var(--cat);
  border-bottom: 2px solid var(--cat);
  transform: rotate(45deg);
  transition: transform .2s ease;
}

.page-faq .kb-qa__item[open] summary::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.page-faq .kb-qa__item summary:hover {
  background: rgba(221, 227, 218, .45);
}

.page-faq .kb-qa__item summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

.page-faq .kb-qa__item[open] summary {
  background: linear-gradient(180deg, rgba(221, 227, 218, .55), transparent);
}

.page-faq .kb-qa__body {
  padding: 2px 16px 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .kb-qa__body p {
  margin: 0 0 10px;
}

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

.page-faq .kb-qa__body a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(29, 127, 122, .4);
}

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

/* ---------- 章节配图 ---------- */
.page-faq .kb-media {
  margin: 0 0 20px;
  padding: 8px;
  background: linear-gradient(150deg, var(--navy), var(--night));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-2);
}

.page-faq .kb-media img {
  display: block;
  width: 100%;
  object-fit: cover;
}

/* ---------- 联系协助 ---------- */
.page-faq .kb-help {
  position: relative;
  overflow: hidden;
  padding: 26px 20px 28px;
  background: linear-gradient(150deg, var(--navy), var(--night) 78%);
  color: var(--snow);
  scroll-margin-top: 90px;
}

.page-faq .kb-help::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--jade), var(--orange) 55%, var(--red));
}

.page-faq .kb-help h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 4.4vw, 29px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--snow);
}

.page-faq .kb-help > p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(246, 245, 239, .78);
}

.page-faq .kb-help__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-help__list li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(246, 245, 239, .14);
  font-size: 14px;
  color: var(--snow);
  word-break: break-word;
}

.page-faq .kb-help__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--jade);
  padding-top: 3px;
}

.page-faq .kb-help__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--orange);
  color: var(--night);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.page-faq .kb-help__cta:hover,
.page-faq .kb-help__cta:focus-visible {
  background: var(--jade);
  color: var(--night);
}

.page-faq .kb-help__cta:focus-visible {
  outline: 2px solid var(--snow);
  outline-offset: 3px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .kb-hero {
    padding: 26px 0 52px;
  }

  .page-faq .kb-hero__grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 44px;
    align-items: center;
  }

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

  .page-faq .kb-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 36px;
    padding: 48px 0 56px;
  }

  .page-faq .kb-index {
    position: sticky;
    top: 92px;
    padding: 18px 16px;
  }

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

  .page-faq .kb-help {
    padding: 34px 32px 36px;
  }

  .page-faq .kb-media {
    margin-bottom: 24px;
  }
}

@media (min-width: 1060px) {
  .page-faq .kb-shell {
    grid-template-columns: 262px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .kb-group {
    margin-bottom: 46px;
  }

  .page-faq .kb-qa__body {
    padding-left: 20px;
    padding-right: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }

  .page-faq .kb-steps li:hover,
  .page-faq .kb-jump a:hover {
    transform: none;
  }
}