.page-faq {
  --faq-block-gap: clamp(48px, 8vw, 104px);
  --faq-accent: var(--cyan);
  --faq-item-accent: var(--cyan);
  color: var(--white);
  background: var(--ink);
  padding-bottom: clamp(56px, 9vw, 112px);
  overflow-x: clip;
}

.page-faq .faq-shell {
  padding-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-shell a {
  color: var(--cyan);
}

.page-faq .faq-shell p a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
  max-width: 48rem;
  padding: clamp(34px, 5vw, 60px) 0 clamp(30px, 4.4vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(72px, 14vw, 168px);
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--orange));
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 6vw, 3.35rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-hero .lede {
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
}

.page-faq .faq-hero__jump li:nth-child(1) { --jump: var(--cyan); }
.page-faq .faq-hero__jump li:nth-child(2) { --jump: var(--yellow); }
.page-faq .faq-hero__jump li:nth-child(3) { --jump: var(--violet); }
.page-faq .faq-hero__jump li:nth-child(4) { --jump: var(--orange); }

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  color: var(--silver);
  font-size: var(--step-1);
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  background: var(--jump, var(--cyan));
  border-color: var(--jump, var(--cyan));
  color: var(--ink);
  transform: translateY(-2px);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(22px, 3.4vw, 38px);
}

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

/* ---------- 左侧索引 ---------- */

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

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li[data-accent="cyan"] { --item-accent: var(--cyan); }
.page-faq .faq-index__list li[data-accent="yellow"] { --item-accent: var(--yellow); }
.page-faq .faq-index__list li[data-accent="orange"] { --item-accent: var(--orange); }
.page-faq .faq-index__list li[data-accent="violet"] { --item-accent: var(--violet); }

.page-faq .faq-index__link {
  display: block;
  white-space: nowrap;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--item-accent, var(--line-strong));
  color: var(--mist);
  background: rgba(18, 48, 42, 0.35);
  font-size: var(--step-1);
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  background: var(--card);
}

/* ---------- 问答区块 ---------- */

.page-faq .faq-block {
  counter-increment: faqblock;
  min-width: 0;
  border-top: 1px solid var(--line);
  padding-top: clamp(22px, 3vw, 34px);
  margin-top: var(--faq-block-gap);
  scroll-margin-top: 128px;
}

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

.page-faq .faq-block[data-accent="cyan"] { --block-accent: var(--cyan); }
.page-faq .faq-block[data-accent="yellow"] { --block-accent: var(--yellow); }
.page-faq .faq-block[data-accent="orange"] { --block-accent: var(--orange); }
.page-faq .faq-block[data-accent="violet"] { --block-accent: var(--violet); }

.page-faq .faq-block__tag {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--block-accent, var(--cyan));
}

.page-faq .faq-block__num::before {
  content: counter(faqblock, decimal-leading-zero);
}

.page-faq .faq-block__num::after {
  content: " / ";
  opacity: 0.45;
}

.page-faq .faq-block__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.24;
  color: var(--white);
}

.page-faq .faq-block__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.85;
}

.page-faq .faq-block .note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--block-accent, var(--cyan));
  color: var(--mist);
  font-size: var(--step-1);
  line-height: 1.8;
}

/* ---------- 三条路径 / 两张卡片 ---------- */

.page-faq .faq-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-paths--two {
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-path {
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ink);
  border-top: 2px solid var(--path-accent, var(--cyan));
  transition: background 200ms ease;
}

.page-faq .faq-path[data-accent="cyan"] { --path-accent: var(--cyan); }
.page-faq .faq-path[data-accent="yellow"] { --path-accent: var(--yellow); }
.page-faq .faq-path[data-accent="orange"] { --path-accent: var(--orange); }
.page-faq .faq-path[data-accent="violet"] { --path-accent: var(--violet); }

.page-faq .faq-path:hover {
  background: var(--card);
}

.page-faq .faq-path__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-faq .faq-path__steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0;
  padding: 0;
}

.page-faq .faq-path__steps li {
  position: relative;
  padding: 8px 0 8px 26px;
  border-top: 1px solid var(--line);
  color: var(--silver);
  font-size: var(--step-1);
  line-height: 1.72;
}

.page-faq .faq-path__steps li:first-child {
  border-top: 0;
}

.page-faq .faq-path__steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 9px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--path-accent, var(--cyan));
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0;
  padding: 0;
  background: var(--steel);
  border: 1px solid var(--line);
}

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

.page-faq .faq-figure .figure-caption {
  margin: 0;
  padding: 12px clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: var(--step-1);
  line-height: 1.7;
}

/* ---------- 可展开步骤 ---------- */

.page-faq .faq-steps {
  margin-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-step {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: background 180ms ease, border-color 180ms ease;
}

.page-faq .faq-step[open] {
  background: rgba(18, 48, 42, 0.4);
  border-left-color: var(--block-accent, var(--cyan));
}

.page-faq .faq-step summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px clamp(12px, 2vw, 18px);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--mist);
}

.page-faq .faq-step[open] summary::after {
  content: "\2212";
  color: var(--block-accent, var(--cyan));
}

.page-faq .faq-step__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--block-accent, var(--cyan));
}

.page-faq .faq-step__title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--white);
}

.page-faq .faq-step__body {
  margin: 0;
  padding: 0 clamp(12px, 2vw, 18px) 18px;
  padding-left: clamp(2.6rem, 8vw, 3.4rem);
  color: var(--mist);
  font-size: var(--step-1);
  line-height: 1.82;
}

/* ---------- 统计范围切换 ---------- */

.page-faq .faq-switch {
  margin-top: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  background: var(--deep);
}

.page-faq .faq-switch__labels {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-switch__labels label {
  flex: 1 1 0;
  min-width: 0;
  padding: 12px 14px;
  border-right: 1px solid var(--line);
  color: var(--mist);
  font-size: var(--step-1);
  text-align: center;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}

.page-faq .faq-switch__labels label:last-child {
  border-right: 0;
}

.page-faq .faq-switch__labels label:hover {
  color: var(--white);
}

.page-faq #faq-metric-a:checked ~ .faq-switch__labels label[for="faq-metric-a"],
.page-faq #faq-metric-b:checked ~ .faq-switch__labels label[for="faq-metric-b"] {
  background: var(--block-accent, var(--yellow));
  color: var(--ink);
  font-weight: 600;
}

.page-faq .faq-views__panel {
  display: none;
  padding: clamp(14px, 2vw, 22px);
}

.page-faq #faq-metric-a:checked ~ .faq-views__panel--a {
  display: block;
}

.page-faq #faq-metric-b:checked ~ .faq-views__panel--b {
  display: block;
}

.page-faq .faq-views__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-views__row + .faq-views__row {
  border-top: 1px solid var(--line);
}

.page-faq .faq-views__key {
  padding: 11px 0 4px;
  color: var(--mist);
  font-size: var(--step-1);
  line-height: 1.6;
}

.page-faq .faq-views__val {
  padding: 0 0 12px;
  color: var(--white);
  font-size: var(--step-1);
  line-height: 1.75;
}

/* ---------- 结尾 ---------- */

.page-faq .faq-ending {
  margin-top: var(--faq-block-gap);
  padding: clamp(24px, 3.6vw, 40px) clamp(20px, 3vw, 36px);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(120deg, rgba(53, 240, 208, 0.08), rgba(142, 123, 255, 0.08) 48%, rgba(255, 106, 43, 0.09));
  box-shadow: var(--shadow-card);
}

.page-faq .faq-ending__text {
  margin: 0 0 clamp(16px, 2.4vw, 22px);
  max-width: 44rem;
  color: var(--silver);
  line-height: 1.85;
}

.page-faq .faq-ending__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-top {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 160ms ease, border-color 160ms ease;
}

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

/* ---------- 平板及以上 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-views__row {
    grid-template-columns: minmax(120px, 36%) minmax(0, 1fr);
  }

  .page-faq .faq-views__key {
    padding: 12px 18px 12px 0;
  }

  .page-faq .faq-views__val {
    padding: 12px 0 12px 18px;
    border-left: 1px solid var(--line);
  }
}

/* ---------- 桌面端：左索引 + 右答案 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(200px, 244px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 136px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-index__link {
    white-space: normal;
    padding: 12px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    margin-left: -1px;
    background: transparent;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: var(--card);
    border-left-color: var(--item-accent, var(--cyan));
    color: var(--white);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__jump a,
  .page-faq .faq-index__link,
  .page-faq .faq-path,
  .page-faq .faq-step,
  .page-faq .faq-top {
    transition: none;
  }

  .page-faq .faq-hero__jump a:hover {
    transform: none;
  }
}