.page-faq {
  --faq-pad: clamp(16px, 2.2vw, 28px);
  --faq-soft: rgba(243, 238, 227, 0.8);
  --faq-dim: rgba(243, 238, 227, 0.55);
  padding-bottom: clamp(56px, 7vw, 108px);
}

.page-faq .crumbs {
  padding-top: clamp(18px, 3vw, 34px);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  margin-top: clamp(20px, 3.4vw, 42px);
  padding-bottom: clamp(28px, 4vw, 52px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(244, 83, 31, 0.16), transparent 58%),
    linear-gradient(180deg, rgba(18, 32, 58, 0.9), rgba(8, 18, 34, 0));
  border-bottom: 1px solid var(--ember);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
  align-items: end;
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--flame);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 18ch;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--bone);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-hero__note {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--copper);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--ember);
  background: var(--ink-2);
  box-shadow: 10px 10px 0 rgba(58, 66, 82, 0.45);
  overflow: hidden;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 50px);
  margin-top: clamp(34px, 5vw, 72px);
}

.page-faq .faq-toc {
  border-top: 1px solid var(--ember);
  padding-top: 14px;
}

.page-faq .faq-toc .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--mist);
}

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

.page-faq .faq-toc .toc__link {
  display: block;
  white-space: nowrap;
  padding: 8px 12px;
  border-bottom: 2px solid transparent;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-toc .toc__link:hover {
  color: var(--bone);
  background: rgba(244, 83, 31, 0.08);
}

.page-faq .faq-toc .toc__link.is-current {
  color: var(--bone);
  border-bottom-color: var(--flame);
  background: rgba(244, 83, 31, 0.12);
}

/* ---------- 章节 ---------- */

.page-faq .faq-section {
  position: relative;
  margin-top: clamp(38px, 5.4vw, 66px);
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

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

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ember);
  background-image: repeating-linear-gradient(90deg, var(--ember) 0 1px, transparent 1px 14px);
  background-position: left bottom;
  background-size: 100% 6px;
  background-repeat: no-repeat;
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--flame);
}

.page-faq .faq-section__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-faq .faq-section__note {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-dim);
}

.page-faq .faq-section__note a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 154, 70, 0.45);
}

.page-faq .faq-section__note a:hover {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-faq .faq-cards {
  margin-top: 18px;
  max-width: 100%;
}

/* ---------- 问答卡片 ---------- */

.page-faq .faq-card {
  position: relative;
  margin-top: 14px;
  background: var(--ink-2);
  border: 1px solid var(--ember);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-faq .faq-card::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, transparent 50%, rgba(58, 66, 82, 0.85) 50%);
  pointer-events: none;
}

.page-faq .faq-card:hover {
  border-color: rgba(244, 83, 31, 0.42);
}

.page-faq .faq-card[open] {
  border-color: rgba(244, 83, 31, 0.5);
  box-shadow: 6px 6px 0 rgba(58, 66, 82, 0.5), 12px 12px 0 rgba(244, 83, 31, 0.12);
  transform: translate(-2px, -2px);
}

.page-faq .faq-card__q {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--bone);
}

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

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

.page-faq .faq-card__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--flame);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.page-faq .faq-card[open] .faq-card__q::after {
  content: "−";
  transform: rotate(180deg);
  color: var(--copper);
}

.page-faq .faq-card__qt {
  flex: 1 1 60%;
  min-width: 0;
}

.page-faq .faq-card__a {
  padding: 0 var(--faq-pad) var(--faq-pad);
}

.page-faq .faq-card__a p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(58, 66, 82, 0.9);
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-card__a a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 154, 70, 0.45);
}

.page-faq .faq-card__a a:hover {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-faq .faq-card[open] .faq-card__a {
  animation: faq-open 0.42s var(--ease) both;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 字段示意 ---------- */

.page-faq .faq-figure {
  margin: 18px 0 0;
  padding: clamp(14px, 2vw, 22px);
  background: linear-gradient(160deg, rgba(18, 32, 58, 0.92), rgba(8, 18, 34, 0.92));
  border: 1px solid var(--ember);
}

.page-faq .faq-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-svg__box {
  fill: rgba(8, 18, 34, 0.9);
  stroke: var(--ember);
  stroke-width: 1;
}

.page-faq .faq-svg__box--key {
  stroke: var(--flame);
}

.page-faq .faq-svg__box--num {
  fill: rgba(201, 154, 70, 0.1);
  stroke: rgba(201, 154, 70, 0.6);
}

.page-faq .faq-svg__t {
  font-family: var(--font-mono);
  font-size: 16px;
  fill: var(--bone);
}

.page-faq .faq-svg__t--key {
  fill: var(--flame);
}

.page-faq .faq-svg__t--num {
  fill: var(--copper);
}

.page-faq .faq-svg__dot {
  font-family: var(--font-mono);
  font-size: 18px;
  fill: var(--mist);
}

.page-faq .faq-svg__anno {
  font-family: var(--font-sans);
  font-size: 13px;
  fill: var(--mist);
}

.page-faq .faq-svg__rule {
  stroke: var(--ember);
  stroke-width: 1;
  stroke-dasharray: 2 6;
}

.page-faq .faq-figure .media__cap {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 粒度对照表 ---------- */

.page-faq .faq-tablewrap {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid var(--ember);
  background: var(--ink-2);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-table__cap {
  padding: 14px var(--faq-pad) 0;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 14px var(--faq-pad);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  border-top: 1px solid rgba(58, 66, 82, 0.75);
}

.page-faq .faq-table thead th {
  border-top: none;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
  background: rgba(8, 18, 34, 0.6);
}

.page-faq .faq-table tbody th {
  color: var(--bone);
  font-weight: 700;
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  color: var(--faq-soft);
}

.page-faq .faq-table tbody tr:hover {
  background: rgba(244, 83, 31, 0.08);
}

/* ---------- 尾部支持入口 ---------- */

.page-faq .faq-help {
  position: relative;
  margin-top: clamp(46px, 6vw, 88px);
  padding: clamp(24px, 3.4vw, 40px);
  background:
    linear-gradient(140deg, rgba(244, 83, 31, 0.14), rgba(8, 18, 34, 0) 62%),
    var(--ink-2);
  border: 1px solid rgba(244, 83, 31, 0.38);
  box-shadow: 8px 8px 0 rgba(58, 66, 82, 0.42);
}

.page-faq .faq-help__title {
  margin: 14px 0 0;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--bone);
  max-width: 20ch;
}

.page-faq .faq-help__text {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-help__text a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 154, 70, 0.45);
}

.page-faq .faq-help__text a:hover {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-faq .faq-hero__title {
    margin-top: 20px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 32px);
    border-top: none;
    padding-top: 0;
    border-left: 1px solid var(--ember);
  }

  .page-faq .faq-toc .toc__title {
    padding-left: 16px;
  }

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

  .page-faq .faq-toc .toc__link {
    display: flex;
    gap: 10px;
    align-items: baseline;
    white-space: normal;
    padding: 11px 14px;
    border-bottom: none;
    border-left: 2px solid transparent;
    font-size: 13.5px;
  }

  .page-faq .faq-toc .toc__link::before {
    content: attr(data-index);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ember);
  }

  .page-faq .faq-toc .toc__link.is-current {
    border-left-color: var(--flame);
    border-bottom-color: transparent;
  }

  .page-faq .faq-toc .toc__link.is-current::before {
    color: var(--copper);
  }

  .page-faq .faq-main > .faq-section:nth-child(1) .faq-cards,
  .page-faq .faq-main > .faq-section:nth-child(2) .faq-cards {
    max-width: 100%;
  }

  .page-faq .faq-main > .faq-section:nth-child(3) .faq-cards,
  .page-faq .faq-main > .faq-section:nth-child(4) .faq-cards {
    max-width: 94%;
  }

  .page-faq .faq-main > .faq-section:nth-child(5) .faq-cards {
    max-width: 88%;
  }

  .page-faq .faq-main > .faq-section:nth-child(6) .faq-cards {
    max-width: 82%;
  }

  .page-faq .faq-main > .faq-section:nth-child(1),
  .page-faq .faq-main > .faq-section:nth-child(2) {
    margin-top: 0;
  }

  .page-faq .faq-help {
    margin-left: auto;
    max-width: 640px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-hero__lead {
    font-size: 17px;
  }

  .page-faq .faq-section__note {
    max-width: 56ch;
  }
}

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

  .page-faq .faq-card[open] .faq-card__a {
    animation: none;
  }

  .page-faq .faq-card[open] {
    transform: none;
  }
}