.page-faq {
  --qa-cyan: var(--cyan-400);
  --qa-amber: var(--amber-500);
  --qa-wine: #8C2A46;
  --qa-indigo: #4A46A8;
  background: var(--ink-950);
  color: var(--cyan-100);
  font-family: var(--font-body);
}

.page-faq .faq-hero {
  background:
    radial-gradient(880px 340px at 10% -20%, rgba(51, 240, 196, 0.16), transparent 68%),
    linear-gradient(180deg, var(--field-800) 0%, var(--ink-950) 100%);
  border-bottom: 1px solid var(--line-dark);
  padding: 28px 0 32px;
}

.page-faq .faq-hero .breadcrumbs {
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-faq .faq-hero .eyebrow {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(26px, 6vw, 42px);
  line-height: 1.18;
  color: var(--white);
  margin: 12px 0 16px;
  max-width: 22ch;
}

.page-faq .faq-hero .lede {
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.page-faq .faq-hero__chips {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero__chips li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line-dark);
  background: rgba(4, 28, 24, 0.45);
  font-size: 13px;
  color: var(--cyan-100);
}

.page-faq .faq-hero__chips .mono {
  color: var(--cyan-400);
  font-size: 11px;
}

.page-faq .faq-main {
  padding: 32px 0 64px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

/* ---------- 症状索引 ---------- */
.page-faq .faq-index {
  background: rgba(10, 59, 50, 0.5);
  border: 1px solid var(--line-dark-soft);
  border-left: 3px solid var(--cyan-400);
  padding: 18px 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-index__group {
  margin: 16px 0 6px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-faq .faq-index__group:first-of-type {
  margin-top: 0;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__list a {
  display: block;
  padding: 6px 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 4px solid transparent;
  transition: background var(--tr), color var(--tr), border-color var(--tr);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: rgba(51, 240, 196, 0.1);
  color: var(--white);
  border-left-color: var(--cyan-400);
}

.page-faq .faq-index__list a[aria-current="true"] {
  background: rgba(51, 240, 196, 0.14);
  color: var(--white);
  border-left-color: var(--cyan-400);
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .qa-block {
  position: relative;
  margin-bottom: 24px;
  padding: 26px 18px 10px;
  border: 1px solid var(--line-dark-soft);
  background: linear-gradient(180deg, rgba(16, 107, 91, 0.22) 0%, rgba(4, 28, 24, 0.6) 100%);
}

.page-faq .qa-block::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--qa-accent, var(--cyan-400));
}

.page-faq .qa-block--cyan { --qa-accent: var(--qa-cyan); }
.page-faq .qa-block--amber { --qa-accent: var(--qa-amber); }
.page-faq .qa-block--wine { --qa-accent: var(--qa-wine); }
.page-faq .qa-block--indigo { --qa-accent: var(--qa-indigo); }

.page-faq .qa-block__head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.page-faq .qa-block__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .qa-block__intro {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mute);
  max-width: 60ch;
}

.page-faq .qa-figure {
  margin: 0 0 18px;
  border: 1px solid var(--line-dark-soft);
  background: rgba(4, 28, 24, 0.5);
}

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

.page-faq .qa-figure figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--line-dark-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--ink-mute);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-item {
  border-top: 1px solid var(--line-dark-soft);
}

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--cyan-100);
  transition: color var(--tr);
}

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

.page-faq .qa-item summary:hover {
  color: var(--white);
}

.page-faq .qa-item summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .qa-num {
  flex: 0 0 auto;
  font-size: 12px;
  line-height: 1.9;
  color: var(--qa-accent, var(--cyan-400));
}

.page-faq .qa-item summary::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-left: auto;
  margin-top: 8px;
  border-right: 2px solid var(--ink-soft);
  border-bottom: 2px solid var(--ink-soft);
  transform: rotate(45deg);
  transition: transform var(--tr);
}

.page-faq .qa-item[open] summary::after {
  transform: rotate(-135deg);
}

.page-faq .qa-body {
  padding: 0 0 16px 34px;
}

.page-faq .qa-body p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 66ch;
}

.page-faq .qa-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-faq .qa-steps li {
  position: relative;
  counter-increment: step;
  padding: 6px 0 6px 30px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cyan-100);
}

.page-faq .qa-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--qa-accent, var(--cyan-400));
  border-bottom: 1px solid var(--qa-accent, var(--cyan-400));
}

/* ---------- 三步核对 ---------- */
.page-faq .checkflow {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .checkflow__step {
  border: 1px solid var(--line-dark-soft);
  border-top: 2px solid var(--qa-indigo);
  background: rgba(35, 32, 80, 0.28);
  padding: 14px 16px;
}

.page-faq .checkflow__num {
  display: block;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
  margin-bottom: 6px;
}

.page-faq .checkflow__step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .checkflow__step p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* ---------- 联系客服 ---------- */
.page-faq .faq-contact {
  position: relative;
  padding: 28px 18px 24px;
  border: 1px solid var(--line-dark);
  background:
    linear-gradient(135deg, rgba(255, 138, 43, 0.16) 0%, rgba(4, 28, 24, 0.85) 46%),
    var(--ink-950);
  overflow: hidden;
}

.page-faq .faq-contact::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 180px;
  height: 180px;
  background: rgba(255, 138, 43, 0.14);
  transform: rotate(24deg);
  pointer-events: none;
}

.page-faq .faq-contact__head h2 {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-contact__head p {
  position: relative;
  z-index: 1;
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 58ch;
}

.page-faq .materials {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .materials li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 12px 14px;
  border: 1px solid var(--line-dark-soft);
  background: rgba(4, 28, 24, 0.6);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .materials .mono {
  font-size: 12px;
  color: var(--amber-500);
}

.page-faq .materials strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.01em;
}

.page-faq .faq-contact__panel {
  position: relative;
  z-index: 1;
  border: 1px solid var(--line-dark);
  background: rgba(4, 28, 24, 0.75);
  padding: 14px 16px 16px;
  margin-bottom: 18px;
}

.page-faq .faq-contact__panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.page-faq .faq-contact__panel-head h3 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-template {
  margin: 0;
  padding: 12px;
  border-left: 3px solid var(--amber-500);
  background: rgba(10, 59, 50, 0.55);
  font-size: 12px;
  line-height: 1.9;
  color: var(--cyan-100);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-faq .faq-contact__foot {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink-mute);
}

.page-faq .faq-contact__foot .text-link {
  color: var(--cyan-400);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 40px 0 44px;
  }

  .page-faq .faq-main {
    padding: 44px 0 80px;
  }

  .page-faq .qa-block {
    padding: 30px 28px 12px;
  }

  .page-faq .qa-item summary {
    font-size: 16px;
  }

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

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

  .page-faq .faq-contact {
    padding: 34px 28px 30px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 32px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 128px);
    overflow: auto;
  }

  .page-faq .faq-contact {
    padding: 36px 32px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .qa-item summary,
  .page-faq .qa-item summary::after {
    transition: none;
  }
}