.page-faq {
  --faq-col: 700px;
  --faq-aside: 268px;
  --faq-gap: 56px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 34px 0 46px;
  background:
    radial-gradient(760px 380px at 6% -22%, rgba(255, 107, 26, 0.18), transparent 68%),
    radial-gradient(620px 340px at 98% -6%, rgba(0, 201, 167, 0.12), transparent 70%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line-strong) 0 1px,
    transparent 1px 24px
  );
  opacity: 0.75;
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin: 0 0 4px;
}

.page-faq .faq-hero__kicker {
  margin: 26px 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-sans);
  font-size: clamp(31px, 5.4vw, 60px);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

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

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 30px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .faq-hero__k {
  color: var(--muted);
}

.page-faq .faq-hero__v {
  color: var(--text);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-directory {
  padding: 34px 0 6px;
  background: var(--ink-800);
}

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

.page-faq .faq-directory__card {
  position: relative;
  display: block;
  padding: 18px 18px 18px 22px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-directory__card:hover,
.page-faq .faq-directory__card:focus-visible {
  border-left-color: var(--orange);
  background: rgba(18, 48, 92, 0.72);
  outline: none;
}

.page-faq .faq-directory__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-directory__name {
  display: block;
  margin-top: 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-directory__desc {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-directory__count {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mint);
}

/* ---------- 正文两栏 ---------- */
.page-faq .faq-split {
  padding: 64px 0 0;
}

.page-faq .anchor-section {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-split__inner {
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-split .section-head {
  margin-bottom: 26px;
}

.page-faq .faq-figure {
  margin: 0 0 28px;
}

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

/* ---------- 三步刻度条 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 22px 16px 22px;
  background: var(--ink-800);
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--orange);
}

.page-faq .faq-steps__item:nth-child(2)::before {
  background: var(--orange-soft);
}

.page-faq .faq-steps__item:nth-child(3)::before {
  background: var(--mint);
}

.page-faq .faq-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-steps__item p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-list {
  margin-top: 4px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  padding-left: 16px;
  transition: border-left-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 107, 26, 0.07), transparent 46%);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 8px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--text);
  transition: color 0.18s var(--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: #ffffff;
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  padding-top: 1px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.35;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--orange);
}

.page-faq .faq-item__num {
  flex: none;
  min-width: 32px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--orange);
}

.page-faq .faq-item__text {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-item__a {
  padding: 0 34px 20px 44px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

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

/* ---------- 右侧注释栏 ---------- */
.page-faq .faq-aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-aside__figure {
  margin: 0;
}

.page-faq .faq-note {
  padding: 16px 16px 18px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-top: 2px solid var(--line-orange);
}

.page-faq .faq-note__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-note p {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-note dl {
  margin: 12px 0 0;
}

.page-faq .faq-note dt {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

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

.page-faq .faq-note dd {
  margin: 3px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .faq-note a {
  color: var(--mint-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 224, 208, 0.4);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
  outline: none;
}

/* ---------- 术语表 ---------- */
.page-faq .faq-terms {
  padding: 64px 0 0;
}

.page-faq .faq-terms .section-head {
  margin-bottom: 24px;
}

.page-faq .faq-table-wrap {
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 14px;
}

.page-faq .faq-table caption {
  caption-side: top;
  padding: 14px 18px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-table thead th {
  padding: 13px 18px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
  background: var(--ink-700);
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
  color: var(--muted);
  vertical-align: top;
}

.page-faq .faq-table tbody tr:nth-child(even) td {
  background: rgba(18, 48, 92, 0.34);
}

.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-table tbody td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
}

.page-faq .faq-table tbody td:nth-child(2) {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mint-soft);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact-section {
  padding: 64px 0 40px;
}

.page-faq .faq-contact {
  display: grid;
  gap: 30px;
  grid-template-columns: minmax(0, 1fr);
  padding: 28px 22px 30px;
  background:
    radial-gradient(560px 280px at 100% 0%, rgba(0, 201, 167, 0.13), transparent 70%),
    var(--ink-700);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-contact__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-contact__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--text);
}

.page-faq .faq-contact__text {
  margin: 14px 0 22px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-contact__list {
  display: grid;
  grid-template-columns: minmax(0, 84px) minmax(0, 1fr);
  gap: 14px 16px;
  margin: 0;
  font-size: 14px;
}

.page-faq .faq-contact__list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  padding-top: 3px;
}

.page-faq .faq-contact__list dd {
  margin: 0;
  color: var(--text);
  line-height: 1.7;
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 46px 0 54px;
  }

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

  .page-faq .faq-contact {
    padding: 34px 30px 36px;
  }

  .page-faq .faq-contact__list {
    grid-template-columns: minmax(0, 110px) minmax(0, 1fr);
  }
}

@media (min-width: 720px) {
  .page-faq .faq-directory__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-split__inner {
    grid-template-columns: minmax(0, var(--faq-col)) minmax(0, var(--faq-aside));
    gap: var(--faq-gap);
    justify-content: start;
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-directory__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 559px) {
  .page-faq .faq-item__a {
    padding-left: 0;
    padding-right: 6px;
  }

  .page-faq .faq-item__q {
    font-size: 15.5px;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-directory__card,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-item__num {
    transition: none;
  }
}