.page-faq {
  --faq-gap: 1.25rem;
  background: var(--paper);
  color: var(--ink);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--void);
  color: var(--paper);
  padding-block: 3.25rem 3.75rem;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    repeating-linear-gradient(112deg, rgba(255, 90, 31, 0.09) 0 2px, transparent 2px 36px),
    radial-gradient(circle at 84% 10%, rgba(0, 180, 216, 0.2), transparent 52%),
    radial-gradient(circle at 6% 98%, rgba(215, 38, 61, 0.24), transparent 48%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--flame) 0%, var(--lava) 52%, var(--cyan) 100%);
}

.page-faq .faq-hero .breadcrumb,
.page-faq .faq-hero .breadcrumb a {
  color: rgba(244, 239, 231, 0.62);
}

.page-faq .faq-hero .breadcrumb a:hover,
.page-faq .faq-hero .breadcrumb a:focus-visible {
  color: var(--flame);
}

.page-faq .faq-hero .eyebrow {
  margin-top: 1.75rem;
  color: var(--amber);
}

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.25rem, 15vw, 8.5rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
  margin: 0.4rem 0 1rem;
  color: var(--white);
}

.page-faq .faq-lede {
  max-width: 36em;
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(244, 239, 231, 0.8);
}

.page-faq .faq-hero-meta {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
}

.page-faq .faq-hero-meta li {
  display: grid;
  gap: 0.25rem;
}

.page-faq .faq-hero-meta-k {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: rgba(244, 239, 231, 0.5);
}

.page-faq .faq-hero-meta-v {
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--amber);
}

/* ============ 页面骨架 ============ */
.page-faq .faq-shell {
  display: grid;
  gap: 2.5rem;
  padding-block: 3rem 4.5rem;
}

/* ============ 左侧问题索引 ============ */
.page-faq .faq-index {
  border-top: 3px solid var(--flame);
  padding-top: 1rem;
}

.page-faq .faq-index-head {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--gray);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.6rem 0.65rem;
  border-left: 3px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
  font-size: var(--fs-14);
  line-height: 1.45;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  border-left-color: var(--flame);
  background: var(--white);
  color: var(--flame);
}

.page-faq .faq-index-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--flame);
  font-weight: 700;
}

/* ============ 右侧内容 ============ */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-block {
  padding-block: 2.5rem;
  border-top: 1px solid var(--rule);
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

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

.page-faq .faq-block-head {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 0.7rem;
}

.page-faq .faq-block-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.05;
  color: var(--flame);
  transition: color 0.25s ease;
}

.page-faq .faq-block[data-active="true"] .faq-block-num {
  color: var(--lava);
}

.page-faq .faq-block-title {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(1.35rem, 4.6vw, var(--fs-28));
  line-height: 1.3;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.page-faq .faq-block-lede {
  margin: 0.4rem 0 0;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .faq-figure {
  margin: 1.75rem 0 0;
  border: 1px solid var(--rule);
  background: var(--white);
}

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

/* ============ 现象条目 ============ */
.page-faq .faq-items {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.page-faq .faq-item {
  position: relative;
  background: var(--white);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--flame);
  padding: 1.15rem 1.15rem 1.4rem;
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.2s ease;
}

.page-faq .faq-item:hover {
  border-left-color: var(--lava);
}

.page-faq .faq-item-symptom {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  margin: 0 0 1.1rem;
  padding: 0.7rem 0.85rem;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--fs-14);
  font-weight: 600;
  line-height: 1.55;
}

.page-faq .faq-tag {
  flex: none;
  padding: 0.15rem 0.4rem;
  background: var(--flame);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ============ 编号步骤 ============ */
.page-faq .faq-steps {
  counter-reset: fstep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .faq-steps > li {
  counter-increment: fstep;
  position: relative;
  padding-left: 2.65rem;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--ink);
}

.page-faq .faq-steps > li::before {
  content: counter(fstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.12rem;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 50%;
  background: var(--flame);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: grid;
  place-items: center;
}

/* ============ 联系引导行 ============ */
.page-faq .faq-ask {
  margin-top: 1.5rem;
  padding: 0.9rem 1rem;
  border: 1px dashed var(--rule);
  border-left: 3px solid var(--amber);
  background: rgba(253, 251, 247, 0.7);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--gray);
}

.page-faq .faq-ask a {
  color: var(--cyan-deep);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.page-faq .faq-ask a:hover,
.page-faq .faq-ask a:focus-visible {
  color: var(--flame);
}

/* ============ 联络区块 ============ */
.page-faq .faq-contact {
  margin-top: 2.5rem;
  padding: 2rem 1.35rem 2.75rem;
  background: var(--void);
  color: var(--paper);
  border-top: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
}

.page-faq .faq-contact .faq-block-title {
  color: var(--white);
}

.page-faq .faq-contact .faq-block-lede {
  color: rgba(244, 239, 231, 0.72);
}

.page-faq .faq-contact-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-faq .faq-contact-card {
  padding: 1.2rem 1.2rem 1.35rem;
  border: 1px solid rgba(244, 239, 231, 0.18);
  border-top: 3px solid var(--cyan);
  background: rgba(255, 255, 255, 0.035);
}

.page-faq .faq-contact-head {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(244, 239, 231, 0.6);
}

.page-faq .faq-contact-val {
  margin: 0.5rem 0 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-contact-text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: rgba(244, 239, 231, 0.76);
}

.page-faq .faq-contact-foot {
  margin: 1.75rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(244, 239, 231, 0.16);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(244, 239, 231, 0.66);
}

.page-faq .faq-contact-foot a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.page-faq .faq-contact-foot a:hover,
.page-faq .faq-contact-foot a:focus-visible {
  color: var(--flame);
}

/* ============ 滚动显现（渐进增强） ============ */
.page-faq [data-reveal][data-visible="false"] {
  opacity: 0;
  transform: translateY(14px);
}

/* ============ 窄屏：索引横向滑动 ============ */
@media (max-width: 61.99rem) {
  .page-faq .faq-index-list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(10.5rem, 1fr);
    overflow-x: auto;
    padding-bottom: 0.4rem;
    scrollbar-width: thin;
  }

  .page-faq .faq-index-list > li {
    min-width: 0;
  }

  .page-faq .faq-index-link {
    border-left-width: 0;
    border-top: 3px solid var(--rule);
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-top-color: var(--flame);
  }
}

/* ============ 桌面：左侧固定索引 + 右侧正文 ============ */
@media (min-width: 62rem) {
  .page-faq .faq-hero {
    padding-block: 4.5rem 5rem;
  }

  .page-faq .faq-shell {
    grid-template-columns: 15.5rem minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
    padding-block: 4rem 6rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }

  .page-faq .faq-block {
    padding-block: 3.25rem;
  }

  .page-faq .faq-items {
    gap: 1.5rem;
  }

  .page-faq .faq-item {
    padding: 1.4rem 1.5rem 1.6rem;
  }

  .page-faq .faq-contact {
    padding: 2.75rem 2.5rem 3.5rem;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

@media (min-width: 75rem) {
  .page-faq .faq-shell {
    grid-template-columns: 17rem minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index-link,
  .page-faq .faq-block-num {
    transition: none;
  }

  .page-faq [data-reveal][data-visible="false"] {
    opacity: 1;
    transform: none;
  }
}