.page-faq {
  --faq-cut: 18px;
  --faq-rule: #D8CBB4;
  background: var(--paper-100);
  color: var(--ink-900);
  font-family: var(--font-body);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 44px;
  background: linear-gradient(180deg, var(--paper-300) 0%, var(--paper-100) 68%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  top: 46px;
  width: 240px;
  height: 1px;
  background: var(--sand-300);
  transform: rotate(-3deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: end;
}

.page-faq .faq-hero__crumbs {
  margin: 0 0 18px;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sand-500);
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-faq .faq-hero__intro {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-800);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px 18px;
  padding-top: 18px;
  border-top: 2px solid var(--sand-500);
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-hero__num {
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-900);
}

.page-faq .faq-hero__label {
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--rock-600);
}

.page-faq .faq-hero__figure {
  margin: 0;
  overflow: hidden;
  background: var(--paper-300);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ============ 主体两栏 ============ */
.page-faq .faq-body {
  padding: 40px 0 56px;
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-faq .faq-toc {
  position: relative;
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--rock-600);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-toc__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-toc__list li {
  flex: none;
}

.page-faq .faq-toc__list a {
  display: block;
  padding: 8px 14px;
  font-size: 13.5px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--rock-600);
  background: var(--paper-300);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-toc__list a:hover {
  color: var(--ink-900);
  background: var(--sand-300);
}

.page-faq .faq-toc__list a.is-active,
.page-faq .faq-toc__list li.is-active a {
  color: var(--ink-900);
  font-weight: 600;
  background: var(--sand-500);
}

/* ============ 问题分组 ============ */
.page-faq .faq-block {
  margin: 0 0 42px;
  padding-top: 20px;
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 78px;
}

.page-faq .faq-block:first-child {
  padding-top: 16px;
  border-top: 2px solid var(--ink-900);
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 4px;
}

.page-faq .faq-block__idx {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--sand-500);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.2;
  color: var(--ink-900);
}

.page-faq .faq-block__note {
  margin: 0 0 14px 34px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--rock-600);
}

/* ============ 折叠条目 ============ */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-900);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--amber-600);
}

.page-faq .faq-item__arrow {
  flex: none;
  width: 13px;
  height: 13px;
  margin-top: 6px;
  background: var(--sand-500);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  transition: transform 0.22s ease, background-color 0.22s ease;
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(90deg);
  background: var(--amber-600);
}

.page-faq .faq-item__a {
  margin: 0 0 16px 25px;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--sand-300);
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-800);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

.page-faq .faq-item__a p:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-item__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 12px;
  padding: 7px 14px;
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink-900);
  background: rgba(200, 145, 47, 0.16);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-item__link::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-faq .faq-item__link:hover {
  transform: translateX(4px);
  background: rgba(200, 145, 47, 0.3);
}

.page-faq .faq-field {
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  white-space: nowrap;
  background: rgba(227, 190, 114, 0.45);
}

/* ============ 深墨联系面板 ============ */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: 48px 0 52px;
  background: var(--ink-900);
  color: var(--paper-100);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  right: -60px;
  bottom: 24px;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(200, 145, 47, 0.22);
  border-radius: 50%;
  pointer-events: none;
}

.page-faq .faq-help__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-faq .faq-help__figure {
  margin: 0;
  overflow: hidden;
  background: var(--ink-800);
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--faq-cut));
}

.page-faq .faq-help__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sand-300);
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.5vw, 34px);
  line-height: 1.16;
  color: var(--paper-100);
}

.page-faq .faq-help__text {
  max-width: 60ch;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--rock-200);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(201, 205, 202, 0.28);
}

.page-faq .faq-help__k {
  flex: none;
  width: 76px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand-300);
}

.page-faq .faq-help__v {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-100);
  word-break: break-word;
}

.page-faq .faq-help__copy {
  flex: none;
  padding: 5px 11px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-100);
  background: transparent;
  border: 1px solid rgba(200, 145, 47, 0.55);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-help__copy:hover {
  background: rgba(200, 145, 47, 0.22);
}

.page-faq .faq-help__copy.is-copied {
  color: var(--ink-900);
  background: var(--pitch-500);
  border-color: var(--pitch-500);
}

.page-faq .faq-help__cta {
  margin-top: 4px;
}

/* ============ 桌面端 ============ */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 52px 0 64px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
  }

  .page-faq .faq-body {
    padding: 56px 0 72px;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 32px;
  }

  .page-faq .faq-toc__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-toc__list li + li {
    margin-top: 4px;
  }

  .page-faq .faq-toc__list a {
    padding: 9px 12px 9px 14px;
    white-space: normal;
    background: transparent;
    border-left: 3px solid var(--rock-200);
    clip-path: none;
  }

  .page-faq .faq-toc__list a:hover {
    background: rgba(227, 190, 114, 0.35);
  }

  .page-faq .faq-toc__list a.is-active,
  .page-faq .faq-toc__list li.is-active a {
    background: var(--sand-500);
    border-left-color: var(--ink-900);
  }

  .page-faq .faq-help {
    padding: 64px 0 68px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: 5fr 7fr;
    gap: 52px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__list a,
  .page-faq .faq-item__q,
  .page-faq .faq-item__arrow,
  .page-faq .faq-item__link,
  .page-faq .faq-help__copy {
    transition: none;
  }

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