.page-faq {
  --faq-accent: var(--j9-cyan);
  --faq-edge: 1px solid var(--j9-line-soft);
  position: relative;
  padding-bottom: clamp(64px, 9vw, 120px);
  color: var(--j9-white);
  background:
    radial-gradient(120% 60% at 86% -12%, rgba(0, 229, 255, 0.12), transparent 62%),
    radial-gradient(80% 50% at -5% 18%, rgba(255, 77, 46, 0.08), transparent 60%),
    var(--j9-ink);
  overflow: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .j9-breadcrumb {
  padding-top: clamp(12px, 3vw, 26px);
}

/* ============ 首屏：指南封面 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--j9-line-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: 0;
  width: 46%;
  height: 100%;
  background: linear-gradient(118deg, rgba(0, 229, 255, 0) 46%, rgba(0, 229, 255, 0.07) 46.4%, rgba(0, 229, 255, 0.07) 47%, rgba(0, 229, 255, 0) 47.4%);
  clip-path: polygon(42% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(30px, 5vw, 52px);
}

.page-faq .faq-hero__lead {
  max-width: 44ch;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--j9-font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--j9-white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.75;
  color: var(--j9-mist);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--j9-line-soft);
  border: 1px solid var(--j9-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-hero__index li {
  background: rgba(11, 26, 47, 0.88);
}

.page-faq .faq-hero__index a {
  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: center;
  gap: 6px 14px;
  padding: 13px 16px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color 0.25s var(--j9-ease), background 0.25s var(--j9-ease);
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a:focus-visible {
  border-left-color: var(--j9-cyan);
  background: rgba(0, 229, 255, 0.07);
}

.page-faq .faq-hero__num {
  font-family: var(--j9-font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--j9-cyan);
}

.page-faq .faq-hero__name {
  font-family: var(--j9-font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--j9-white);
}

.page-faq .faq-hero__hint {
  grid-column: 2;
  font-family: var(--j9-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--j9-steel);
}

/* ============ 主体骨架 ============ */
.page-faq .faq-body {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  padding-top: clamp(36px, 5vw, 64px);
}

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

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

/* ============ 章节 ============ */
.page-faq .faq-sec {
  scroll-margin-top: calc(var(--j9-header-h) + 24px);
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(46px, 7vw, 84px);
  padding-top: clamp(34px, 5vw, 56px);
  border-top: 1px solid var(--j9-line-soft);
}

.page-faq .faq-sec--warm {
  --faq-accent: var(--j9-flame);
}

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding-top: 16px;
  border-top: 2px solid var(--faq-accent);
  margin-bottom: 26px;
}

.page-faq .faq-sec__num {
  font-family: var(--j9-font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--faq-accent);
  letter-spacing: -0.02em;
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--j9-font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.005em;
  color: var(--j9-white);
}

.page-faq .faq-sec__lede {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--j9-mist);
  max-width: 60ch;
}

/* ============ 问答手风琴微调 ============ */
.page-faq .j9-accordion {
  border-top: 1px solid var(--j9-line);
}

.page-faq .j9-accordion__item {
  border-bottom: 1px solid var(--j9-line-soft);
}

.page-faq .faq-q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.page-faq .j9-accordion__trigger {
  width: 100%;
  text-align: left;
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .j9-accordion__index {
  font-family: var(--j9-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--faq-accent);
}

.page-faq .j9-accordion__panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--j9-mist);
}

.page-faq .j9-accordion__panel a {
  color: var(--j9-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-faq .j9-accordion__panel a:hover,
.page-faq .j9-accordion__panel a:focus-visible {
  border-bottom-color: var(--j9-cyan);
}

/* ============ 插图 ============ */
.page-faq .faq-figure {
  margin: clamp(28px, 4vw, 42px) 0 0;
}

.page-faq .faq-figure .j9-figure__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 数据指标带 ============ */
.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(28px, 4vw, 40px);
  background: var(--j9-line-soft);
  border: 1px solid var(--j9-line);
}

.page-faq .faq-metrics .j9-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 16px;
  background: var(--j9-ink-deep);
}

.page-faq .faq-metrics .j9-stat__value {
  font-family: var(--j9-font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--j9-white);
}

.page-faq .faq-metrics .j9-stat--cyan .j9-stat__value {
  color: var(--j9-cyan);
}

.page-faq .faq-metrics .j9-stat--flame .j9-stat__value {
  color: var(--j9-flame);
}

.page-faq .faq-metrics .j9-stat__label {
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--j9-steel);
}

/* ============ 联系卡片 ============ */
.page-faq .faq-contact {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-faq .faq-contact__card {
  padding: clamp(22px, 3vw, 32px);
  border-left: 3px solid var(--j9-flame);
}

.page-faq .faq-contact__card .j9-panel__head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.page-faq .j9-panel__title {
  margin: 0;
  font-family: var(--j9-font-display);
  font-size: clamp(19px, 2.6vw, 23px);
  font-weight: 700;
  color: var(--j9-white);
}

.page-faq .faq-contact__copy {
  margin-top: 20px;
}

.page-faq .faq-contact__copy .j9-copy {
  width: 100%;
  text-align: left;
}

.page-faq .faq-contact__list {
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--j9-line-soft);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 12px;
  padding: 12px 0;
  background: transparent;
}

.page-faq .faq-contact__row dt {
  font-family: var(--j9-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--j9-steel);
  padding-top: 3px;
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--j9-mist);
  word-break: break-word;
}

.page-faq .faq-contact__btn {
  margin-top: 22px;
}

/* ============ 移动端 ============ */
@media (max-width: 560px) {
  .page-faq .faq-hero__index a {
    grid-template-columns: 34px 1fr;
    gap: 4px 12px;
    padding: 12px 13px;
  }

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

  .page-faq .faq-metrics {
    grid-template-columns: 1fr;
  }

  .page-faq .j9-accordion__trigger {
    gap: 10px;
    padding: 16px 2px;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 52px 1fr;
  }
}

/* ============ 桌面：目录 + 内容双栏 ============ */
@media (min-width: 760px) {
  .page-faq .faq-hero__index a {
    grid-template-columns: 40px 1fr auto;
  }

  .page-faq .faq-hero__hint {
    grid-column: 3;
    text-align: right;
  }

  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(320px, 1fr);
    align-items: end;
  }

  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
    gap: clamp(40px, 5vw, 68px);
  }

  .page-faq .faq-toc {
    display: block;
    position: sticky;
    top: calc(var(--j9-header-h) + 30px);
    padding-right: 20px;
    border-right: 1px solid var(--j9-line-soft);
  }

  .page-faq .faq-toc__title {
    margin: 0 0 14px;
    font-family: var(--j9-font-mono);
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--j9-steel);
  }

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

  .page-faq .faq-toc__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 8px 10px;
    font-size: 14px;
    color: var(--j9-mist);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color 0.22s var(--j9-ease), border-color 0.22s var(--j9-ease), background 0.22s var(--j9-ease);
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    color: var(--j9-white);
    border-left-color: var(--j9-cyan);
    background: rgba(0, 229, 255, 0.08);
  }

  .page-faq .faq-toc__num {
    font-family: var(--j9-font-mono);
    font-size: 11.5px;
    font-weight: 700;
    color: var(--j9-cyan);
  }

  .page-faq .faq-toc__note {
    margin: 22px 0 0;
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--j9-steel);
  }

  .page-faq .faq-toc__cta {
    display: inline-block;
    margin-top: 10px;
    font-family: var(--j9-font-mono);
    font-size: 12.5px;
    letter-spacing: 0.04em;
    color: var(--j9-cyan);
    text-decoration: none;
  }

  .page-faq .faq-toc__cta:hover,
  .page-faq .faq-toc__cta:focus-visible {
    color: var(--j9-white);
  }
}
<<<END>>>