.page-faq {
  --faq-index-w: 272px;
  --amber-wash: rgba(255, 163, 92, 0.12);
  --coral-line: rgba(255, 107, 74, 0.42);
  padding-bottom: 96px;
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: 10px 0 32px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 20ch;
}

.page-faq .faq-hero .lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-facts li {
  position: relative;
  padding-left: 15px;
  font-size: 13.5px;
  color: var(--muted);
}

.page-faq .faq-hero-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--cyan);
}

.page-faq .faq-hero-facts li:nth-child(2)::before {
  background: var(--coral);
}

.page-faq .faq-hero-facts li:nth-child(3)::before {
  background: var(--amber);
}

/* ---------- 两列空间 ---------- */

.page-faq .faq-wall {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}

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

/* ---------- 左侧索引 ---------- */

.page-faq .faq-index {
  padding: 20px 18px 22px;
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-index-title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-index-group + .faq-index-group {
  margin-top: 20px;
}

.page-faq .faq-index-group-title {
  margin: 0 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
  font-weight: 800;
  color: var(--ink);
}

.page-faq .faq-index-link {
  display: block;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

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

/* ---------- 分组标题 ---------- */

.page-faq .faq-group {
  margin-bottom: 48px;
}

.page-faq .faq-group-head {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 68px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-group--amber .faq-group-head::after {
  background: var(--amber);
}

.page-faq .faq-group-num {
  flex: 0 0 auto;
  padding: 3px 8px;
  background: var(--cyan-wash);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan);
}

.page-faq .faq-group--amber .faq-group-num {
  background: var(--amber-wash);
  color: var(--amber);
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---------- 视觉块 ---------- */

.page-faq .faq-figure {
  margin: 0 0 26px;
}

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

/* ---------- 答案卡片 ---------- */

.page-faq .faq-item {
  position: relative;
  padding: 20px 22px 22px;
  background: var(--panel);
  border: 1px solid var(--line-cyan);
  clip-path: polygon(
    0 0,
    calc(100% - 16px) 0,
    100% 16px,
    100% 100%,
    16px 100%,
    0 calc(100% - 16px)
  );
  scroll-margin-top: 110px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 14px;
}

.page-faq .faq-item:hover {
  border-color: var(--line-cyan-strong);
  transform: translateY(-2px);
}

.page-faq .faq-item:target {
  border-color: var(--coral);
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--coral-line);
}

.page-faq .faq-q {
  display: flex;
  gap: 12px;
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-q-num {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--cyan);
}

.page-faq .faq-item:target .faq-q-num {
  color: var(--coral);
}

.page-faq .faq-a {
  margin: 10px 0 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-a a:hover {
  color: var(--mist);
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  display: grid;
  gap: 7px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: flex;
  gap: 10px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep);
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--coral-line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--coral);
}

/* ---------- 末尾提示 ---------- */

.page-faq .faq-tail {
  margin-top: 8px;
  padding: 24px 24px 26px;
}

.page-faq .faq-tail .panel-label {
  margin: 0 0 10px;
}

.page-faq .faq-tail .panel-text {
  margin: 0 0 18px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 断点 ---------- */

@media (min-width: 768px) {
  .page-faq .faq-hero h1 {
    font-size: 40px;
  }

  .page-faq .faq-group-title {
    font-size: 23px;
  }

  .page-faq .faq-item {
    padding: 22px 28px 24px;
  }

  .page-faq .faq-q {
    font-size: 18px;
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-wall {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 46px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 132px);
    overflow-y: auto;
  }

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

@media (min-width: 1280px) {
  .page-faq .faq-hero h1 {
    font-size: 44px;
  }

  .page-faq .faq-wall {
    gap: 56px;
  }
}