.page-faq {
  --faq-rule: rgba(22, 40, 60, 0.16);
  --faq-rule-soft: rgba(22, 40, 60, 0.08);
  --faq-cut: 12px;
  background: var(--paper);
  color: var(--text);
  padding-bottom: clamp(64px, 9vw, 132px);
  overflow-x: clip;
}

.page-faq [id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(29px, 5.6vw, 60px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
  max-width: 20ch;
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 92px;
  height: 3px;
  margin-top: 26px;
  background: var(--amber);
  transform: skewX(-26deg);
}

.page-faq .faq-hero__body {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 14px;
  max-width: 64ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 页内跳转 ---------- */

.page-faq .faq-jump {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--faq-rule);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-jump__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rock);
}

.page-faq .faq-jump__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 4px 2px 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-jump__link {
  display: inline-block;
  white-space: nowrap;
  padding: 6px 12px;
  border: 1px solid var(--faq-rule);
  background: rgba(247, 242, 232, 0.7);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.4;
  color: var(--ink-blue);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  transition: background-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-jump__link:hover {
  background: var(--amber-soft);
  transform: translateY(-2px);
}

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

/* ---------- 章节通用 ---------- */

.page-faq .faq-section {
  margin-top: clamp(46px, 7vw, 88px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-section__index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--rock);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.35;
  color: var(--ink-blue);
}

.page-faq .faq-section__note {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rock);
  max-width: 62ch;
}

/* ---------- 步骤轨 ---------- */

.page-faq .faq-rail {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--faq-rule);
}

.page-faq .faq-step:last-child {
  border-bottom: 0;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--ink-blue);
  padding-top: 3px;
}

.page-faq .faq-step__num::after {
  content: "";
  position: absolute;
  left: 10px;
  top: 30px;
  bottom: -6px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(22, 40, 60, 0.22), rgba(22, 40, 60, 0));
  transform: skewX(-14deg);
}

.page-faq .faq-step:last-child .faq-step__num::after {
  display: none;
}

.page-faq .faq-step__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-blue);
}

.page-faq .faq-step__text {
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 三步上手配图 ---------- */

.page-faq .faq-figure {
  margin-top: clamp(26px, 4vw, 44px);
}

/* ---------- 三条主线 ---------- */

.page-faq .faq-track {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px dashed var(--faq-rule);
}

.page-faq .faq-track__band {
  display: block;
  width: 56px;
  height: 3px;
  margin-bottom: 16px;
  transform: skewX(-26deg);
}

.page-faq .faq-track--new .faq-track__band {
  background: var(--ink-blue);
}

.page-faq .faq-track--amber .faq-track__band {
  background: var(--amber);
}

.page-faq .faq-track--moss .faq-track__band {
  background: var(--moss);
}

.page-faq .faq-track__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-faq .faq-track__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.45;
  color: var(--ink-blue);
}

.page-faq .faq-track__note {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  max-width: 62ch;
}

.page-faq .faq-track__more {
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rock);
  max-width: 62ch;
}

.page-faq .faq-inline-link {
  color: var(--ink-blue);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
  transition: background-color 180ms var(--ease);
}

.page-faq .faq-inline-link:hover {
  background: var(--amber-soft);
}

.page-faq .faq-inline-link:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---------- 对照分栏 ---------- */

.page-faq .faq-split {
  display: grid;
  gap: 26px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .faq-split__aside {
  order: -1;
}

/* ---------- 深色通道卡 ---------- */

.page-faq .faq-inkcard {
  padding: clamp(24px, 4.5vw, 56px);
  background: var(--ink-blue);
  color: var(--paper);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-faq .faq-inkcard .faq-section__index {
  color: var(--amber-soft);
}

.page-faq .faq-inkcard .faq-section__title {
  color: var(--paper);
}

.page-faq .faq-inkcard .faq-section__note {
  color: rgba(247, 242, 232, 0.74);
}

.page-faq .faq-inkcard .faq-step {
  border-bottom-color: rgba(247, 242, 232, 0.18);
}

.page-faq .faq-inkcard .faq-step__num {
  color: var(--amber-soft);
}

.page-faq .faq-inkcard .faq-step__num::after {
  background: linear-gradient(to bottom, rgba(242, 200, 121, 0.5), rgba(242, 200, 121, 0));
}

.page-faq .faq-inkcard .faq-step__title {
  color: var(--paper);
}

.page-faq .faq-inkcard .faq-step__text {
  color: rgba(247, 242, 232, 0.84);
}

.page-faq .faq-inkcard .faq-track__more {
  color: rgba(247, 242, 232, 0.7);
}

.page-faq .faq-inkcard .faq-inline-link {
  color: var(--amber-soft);
  border-bottom-color: rgba(242, 200, 121, 0.6);
}

.page-faq .faq-inkcard .faq-inline-link:hover {
  background: rgba(242, 200, 121, 0.18);
}

/* ---------- 排查清单 ---------- */

.page-faq .faq-checks {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-check {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-check__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-blue);
  transition: background-color 180ms var(--ease);
}

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

.page-faq .faq-check__q:hover {
  background: rgba(242, 200, 121, 0.22);
}

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

.page-faq .faq-check__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-faq .faq-check__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--clay);
}

.page-faq .faq-check[open] .faq-check__q::after {
  content: "−";
}

.page-faq .faq-check__a {
  padding: 0 4px 20px 40px;
}

.page-faq .faq-check__a p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 联系 ---------- */

.page-faq .faq-contact {
  display: grid;
  gap: 26px;
  padding: clamp(24px, 4vw, 48px);
  border-left: 4px solid var(--amber);
  background: rgba(22, 40, 60, 0.04);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-faq .faq-contact__mail {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
  word-break: break-all;
}

.page-faq .faq-contact__mail a {
  color: var(--ink-blue);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
}

.page-faq .faq-contact__mail a:hover {
  background: var(--amber-soft);
}

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

.page-faq .faq-contact__hint {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-step {
    grid-template-columns: 52px 1fr;
    gap: 20px;
    padding: 22px 0;
  }

  .page-faq .faq-step__num {
    font-size: 15px;
  }

  .page-faq .faq-step__num::after {
    left: 14px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__title {
    max-width: 16ch;
  }

  .page-faq .faq-split {
    grid-template-columns: 7fr 5fr;
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-split__aside {
    order: 0;
  }

  .page-faq .faq-contact {
    grid-template-columns: 7fr 5fr;
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
  }

  .page-faq .faq-track__note,
  .page-faq .faq-track__more {
    max-width: 58ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__link,
  .page-faq .faq-check__q,
  .page-faq .faq-inline-link {
    transition: none;
  }

  .page-faq .faq-jump__link:hover {
    transform: none;
  }
}