.page-faq {
  --faq-text: #C6D2CB;
  --faq-line: rgba(25, 247, 210, 0.16);
  padding-bottom: 68px;
}

.page-faq .breadcrumb {
  margin: 22px 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-faq .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--gray);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--hair);
}

.page-faq .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  text-decoration: underline;
}

/* ---------- 封面 ---------- */

.page-faq .faq-cover {
  border-top: 2px solid var(--hair);
  border-bottom: 2px solid var(--hair);
  padding: 32px 0 30px;
  background:
    radial-gradient(circle at 88% 8%, rgba(230, 255, 59, 0.10), transparent 46%),
    linear-gradient(180deg, rgba(11, 31, 26, 0.92), rgba(10, 13, 12, 0.72)),
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 36px),
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 36px);
}

.page-faq .faq-cover__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-faq .faq-cover h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 6vw, 50px);
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--white);
  max-width: 20ch;
}

.page-faq .faq-cover__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-cover__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-faq .faq-cover__num {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--volt);
  margin-right: 4px;
}

.page-faq .faq-cover__figure {
  margin: 0;
  border: 2px solid var(--hair);
  box-shadow: var(--hard-dark);
}

.page-faq .media-frame {
  position: relative;
  overflow: hidden;
  background: var(--panel-2);
}

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

.page-faq .media-frame__caption {
  display: block;
  padding: 9px 13px;
  border-top: 1px solid var(--hair-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
  background: rgba(10, 13, 12, 0.6);
}

/* ---------- 快速索引 ---------- */

.page-faq .faq-index__label {
  margin: 30px 0 12px;
  color: var(--cyan);
}

.page-faq .faq-index {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 2px solid var(--hair-soft);
  border-left: 4px solid var(--cyan);
  background: var(--panel-2);
  box-shadow: var(--hard-dark);
  color: var(--white);
  text-decoration: none;
  transition: transform 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 {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  background: rgba(18, 53, 44, 0.92);
}

.page-faq .faq-index__idx {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--volt);
  letter-spacing: -0.02em;
}

.page-faq .faq-index__body {
  display: block;
}

.page-faq .faq-index__body strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
}

.page-faq .faq-index__body em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--gray);
}

/* ---------- 三栏骨架 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 38px;
}

.page-faq .faq-rail .field-label {
  margin: 0 0 10px;
  color: var(--gray);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 13px;
  border: 2px solid var(--hair-soft);
  background: var(--panel);
  color: var(--faq-text);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.page-faq .faq-rail__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--volt);
}

/* ---------- 问答区块 ---------- */

.page-faq .faq-block {
  margin-bottom: 40px;
  scroll-margin-top: 24px;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--hair);
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--volt);
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-faq .faq-block__desc {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
}

.page-faq .faq-item {
  border: 2px solid var(--hair-soft);
  background: var(--panel);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--cyan);
  box-shadow: var(--hard-dark);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q::before {
  content: "Q";
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  color: var(--volt);
}

.page-faq .faq-q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "–";
}

.page-faq .faq-q:hover {
  color: var(--cyan);
}

.page-faq .faq-a {
  padding: 2px 18px 18px 46px;
  border-left: 3px solid var(--cyan);
  margin-left: 17px;
  background: linear-gradient(90deg, rgba(25, 247, 210, 0.05), transparent 70%);
}

.page-faq .faq-a p {
  margin: 0 0 9px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-text);
}

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

.page-faq .faq-entry__figure {
  margin: 20px 0 0;
  border: 2px solid var(--hair-soft);
  box-shadow: var(--hard-dark);
}

/* ---------- 联系区 ---------- */

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .faq-contact__cell {
  padding: 16px 17px;
  border: 2px solid var(--hair-soft);
  border-top: 3px solid var(--cyan);
  background: var(--panel-2);
}

.page-faq .faq-contact__cell--warm {
  border-top-color: var(--orange);
  box-shadow: var(--hard-warm);
}

.page-faq .faq-contact__cell .field-label {
  margin: 0 0 8px;
  color: var(--gray);
}

.page-faq .faq-contact__value {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--volt);
  word-break: break-word;
}

.page-faq .faq-contact__cell .text-muted {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 右侧卡片 ---------- */

.page-faq .faq-card {
  border: 2px solid var(--hair);
  background: var(--panel);
  padding: 17px;
  margin-bottom: 16px;
  box-shadow: var(--hard-dark);
}

.page-faq .faq-card--warm {
  border-color: rgba(255, 122, 26, 0.5);
  box-shadow: var(--hard-warm);
}

.page-faq .faq-card .field-label {
  margin: 0 0 12px;
  color: var(--cyan);
}

.page-faq .faq-card--warm .field-label {
  color: var(--orange);
}

.page-faq .faq-metrics {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-metrics li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--faq-line);
  font-size: 13px;
}

.page-faq .faq-metrics li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-metrics__k {
  color: var(--gray);
}

.page-faq .faq-metrics__v {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--volt);
  white-space: nowrap;
}

.page-faq .faq-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-links li + li {
  border-top: 1px dashed rgba(255, 122, 26, 0.22);
}

.page-faq .faq-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 0;
  color: var(--faq-text);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-links a::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.page-faq .faq-links a:hover,
.page-faq .faq-links a:focus-visible {
  color: var(--white);
  padding-left: 6px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cover__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
  }

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

  .page-faq .faq-contact__cell:last-child {
    grid-column: span 2;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: 194px minmax(0, 1fr) 262px;
    gap: 30px;
    align-items: start;
  }

  .page-faq .faq-rail,
  .page-faq .faq-aside {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: 4px;
  }

  .page-faq .faq-rail__list a {
    display: flex;
    width: 100%;
    border-width: 0 0 0 2px;
    border-color: var(--hair-soft);
    border-left-style: solid;
    background: transparent;
    padding: 9px 10px;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(18, 53, 44, 0.7);
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__cell:last-child {
    grid-column: auto;
  }

  .page-faq .faq-cover h1 {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-links a,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}