.page-faq {
  --faq-toc: 240px;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-faq .faq-crumb {
  padding-top: 22px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--hair);
  background-image:
    linear-gradient(180deg, rgba(22, 227, 180, 0.09), rgba(22, 227, 180, 0) 78%),
    repeating-linear-gradient(90deg, var(--hair-soft) 0 1px, transparent 1px 96px);
  background-position: 0 0, 0 0;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 16px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 44ch;
  color: var(--paper);
}

.page-faq .faq-hero__aside {
  border-top: 1px solid var(--hair-strong);
  padding-top: 18px;
}

.page-faq .faq-facts {
  margin: 0 0 16px;
  display: grid;
  gap: 12px;
}

.page-faq .faq-facts div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--hair-soft);
  padding-bottom: 10px;
}

.page-faq .faq-facts dt {
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--cyan-soft);
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-shell {
  display: grid;
  gap: 32px;
  padding: 40px 0 72px;
}

/* ---------- 章节目录 ---------- */

.page-faq .faq-toc {
  border: 1px solid var(--hair);
  background: var(--zone);
  padding: 18px 16px 20px;
}

.page-faq .faq-toc__title {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 1px;
  counter-reset: none;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--paper);
  background: rgba(22, 227, 180, 0.08);
  border-left-color: var(--cyan);
}

.page-faq .faq-toc__id {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--cyan);
  flex: none;
}

.page-faq .faq-toc__cta {
  display: block;
  text-align: center;
}

/* ---------- 章节 ---------- */

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

.page-faq .faq-chapter {
  scroll-margin-top: 24px;
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-chapter:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-chapter--panel {
  background: var(--zone);
  border: 1px solid var(--hair);
  padding: 24px 18px 30px;
  margin-bottom: 40px;
}

.page-faq .faq-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.page-faq .faq-chapter__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid var(--hair-strong);
  padding: 4px 9px;
  flex: none;
}

.page-faq .faq-chapter h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 4.4vw, 33px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  flex: 1 1 260px;
  min-width: 0;
}

.page-faq .faq-chapter p {
  margin: 0 0 1em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 48ch;
}

.page-faq .faq-chapter p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-subhead {
  margin: 26px 0 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-soft);
}

.page-faq .faq-callout {
  border-left: 2px solid var(--flare);
  background: rgba(59, 15, 34, 0.55);
  padding: 14px 16px;
  margin: 24px 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
  max-width: 52ch;
}

.page-faq .faq-tail {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: 22px 0 26px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--hair);
  background: var(--panel);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--mist);
  line-height: 1.6;
}

/* ---------- 章节目录列表 ---------- */

.page-faq .doc-chapters {
  list-style: none;
  margin: 0 0 6px;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-faq .doc-chapters li {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
}

.page-faq .doc-chapters__id {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--cyan);
  padding-top: 4px;
}

.page-faq .doc-chapters__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 3px;
}

.page-faq .doc-chapters__desc {
  margin: 0 !important;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
  max-width: 52ch;
}

.page-faq .term-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

/* ---------- 三步定位 ---------- */

.page-faq .steps {
  display: grid;
  gap: 20px;
  margin: 24px 0 20px;
}

.page-faq .step {
  position: relative;
  border: 1px solid var(--hair);
  border-top: 2px solid var(--cyan);
  background: var(--zone);
  padding: 20px 16px 18px;
  min-width: 0;
}

.page-faq .step__num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--hair-strong);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.page-faq .step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .step__body {
  margin: 0 0 12px !important;
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper);
  max-width: none;
}

.page-faq .step__warn {
  margin: 0 !important;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  max-width: none;
  border-top: 1px solid var(--hair-soft);
  padding-top: 10px;
}

.page-faq .step__warn span {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--flare);
  border: 1px solid var(--flare);
  padding: 1px 6px;
  margin-right: 8px;
}

/* ---------- 问答折叠 ---------- */

.page-faq .qa-set {
  margin-top: 22px;
  border-top: 1px solid var(--hair);
}

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

.page-faq .qa[open] {
  background: rgba(18, 53, 43, 0.55);
}

.page-faq .qa__q {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 12px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

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

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

.page-faq .qa__q::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] .qa__q::after {
  content: "\2013";
}

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

.page-faq .qa__body {
  padding: 0 12px 20px;
}

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

.page-faq .steps-list li {
  position: relative;
  padding-left: 36px;
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper);
}

.page-faq .steps-list li:last-child {
  margin-bottom: 0;
}

.page-faq .steps-list li::before {
  counter-increment: qs;
  content: counter(qs);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--cyan);
  border: 1px solid var(--hair-strong);
}

/* ---------- 提交清单 ---------- */

.page-faq .check-grid {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  margin: 22px 0;
}

.page-faq .check-item {
  background: var(--ink);
  padding: 18px 16px;
}

.page-faq .check-item__id {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--flare);
  border: 1px solid var(--hair-strong);
  padding: 2px 8px;
  margin-bottom: 10px;
}

.page-faq .check-item__name {
  margin: 0 0 6px !important;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  max-width: none;
}

.page-faq .check-item__desc {
  margin: 0 !important;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
  max-width: none;
}

/* ---------- 联系方式 ---------- */

.page-faq .contact-grid {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  margin: 22px 0 18px;
}

.page-faq .contact-cell {
  background: var(--panel);
  padding: 20px 16px;
}

.page-faq .contact-cell__label {
  margin: 0 0 10px !important;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  max-width: none;
}

.page-faq .contact-cell__value {
  margin: 0 0 10px !important;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(15px, 3.6vw, 20px);
  color: var(--cyan-soft);
  letter-spacing: -0.01em;
  word-break: break-all;
  max-width: none;
}

.page-faq .contact-cell__note {
  margin: 0 !important;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
  max-width: none;
}

/* ---------- 检索词对照 ---------- */

.page-faq .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.page-faq .term-filter > .note {
  margin: 0 0 16px;
}

.page-faq .term-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-faq .term {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
}

.page-faq .term__need {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper);
  min-width: 0;
}

.page-faq .term__go {
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-strong);
  padding-bottom: 2px;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.page-faq [data-filter-item][hidden] {
  display: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .check-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .step:not(:last-child)::after {
    content: "\2192";
    position: absolute;
    top: 24px;
    right: -15px;
    font-family: var(--font-data);
    font-size: 14px;
    line-height: 1;
    color: var(--cyan);
    z-index: 2;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 42px 0 52px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-toc) minmax(0, 1fr);
    gap: 56px;
    padding: 52px 0 88px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 24px;
  }

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

@media (min-width: 1200px) {
  .page-faq .check-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .term__go {
    transition: none;
  }
}