.page-faq {
  background: var(--ink);
  color: var(--snow);
}

.page-faq .breadcrumb {
  padding-top: clamp(14px, 3vw, 26px);
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-top: var(--line-w) solid var(--line);
  border-bottom: var(--line-w) solid var(--line);
  background: linear-gradient(158deg, var(--deep) 0%, var(--ink) 64%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 52px);
  opacity: .45;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-block: clamp(36px, 6vw, 78px);
}

.page-faq .faq-hero__lede {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-hero__lede h1 {
  margin: 0;
  font-size: clamp(2.1rem, 6.4vw, 4.4rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__sub {
  max-width: 40em;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-quick {
  display: grid;
  gap: 10px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 10px 14px;
  border-left: 4px solid var(--line);
  background: rgba(18, 36, 31, .6);
  font-size: 1rem;
  line-height: 1.6;
}

.page-faq .faq-quick .mono {
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--signal);
}

.page-faq .faq-search {
  display: grid;
  gap: 8px;
  margin-top: 8px;
  padding: 16px 18px 14px;
  border: var(--line-w) solid var(--line);
  background: var(--deep-2);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-search input {
  width: 100%;
  padding: 10px 2px;
  border: 0;
  border-bottom: var(--line-w) solid var(--line);
  background: transparent;
  color: var(--snow);
  font-family: var(--font-data);
  font-size: 1rem;
  line-height: 1.4;
}

.page-faq .faq-search input::placeholder {
  color: var(--muted);
}

.page-faq .faq-search input:focus {
  outline: none;
  border-bottom-color: var(--data);
  box-shadow: 0 3px 0 0 var(--data);
}

.page-faq .faq-search__hint {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-hero__media {
  margin: 0;
  align-self: start;
}

.page-faq .faq-hero__media .media {
  border: var(--line-w) solid var(--line);
  box-shadow: var(--shadow-hard);
}

/* ---------- 主体区 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  padding-block: clamp(38px, 7vw, 80px);
}

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

.page-faq .faq-cat {
  margin-bottom: clamp(34px, 5vw, 60px);
  scroll-margin-top: 120px;
}

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

.page-faq .faq-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 14px 16px;
  border: var(--line-w) solid var(--line);
  border-left-width: 10px;
  background: var(--deep);
}

.page-faq .faq-cat__head h2 {
  margin: 0;
  flex: 1 1 auto;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 600;
  line-height: 1.25;
}

.page-faq .faq-cat__idx {
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-cat__count {
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-cat--sub .faq-cat__head {
  border-left-color: var(--signal);
  padding-block: 14px;
}

.page-faq .faq-cat--data .faq-cat__head {
  border-left-color: var(--data);
  padding-block: 20px;
}

.page-faq .faq-cat--recap .faq-cat__head {
  border-left-color: var(--amber);
  padding-block: 16px;
}

.page-faq .faq-cat--tv .faq-cat__head {
  border-left-color: var(--paper);
  padding-block: 22px;
}

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

/* ---------- 折叠条目 ---------- */

.page-faq .faq-item {
  margin-top: 10px;
  border: var(--line-w) solid var(--line);
  background: var(--deep-2);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--snow);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary:hover .faq-q {
  color: var(--signal);
}

.page-faq .faq-num {
  padding: 2px 7px;
  border: 1px solid var(--line);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-q {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.55;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-sign {
  font-family: var(--font-data);
  font-size: 1.1rem;
  line-height: 1.3;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-sign::before {
  content: "+";
}

.page-faq .faq-item[open] > summary {
  background: var(--deep);
}

.page-faq .faq-item[open] .faq-num {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
}

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

.page-faq .faq-item[open] .faq-sign::before {
  content: "–";
}

.page-faq .faq-answer {
  display: grid;
  gap: 14px;
  padding: 0 16px 18px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-answer__body p {
  max-width: 42em;
  margin: 0 0 10px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

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

.page-faq .faq-note {
  display: grid;
  gap: 8px;
  align-content: start;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-note a {
  display: inline-block;
  width: fit-content;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(70, 214, 230, .45);
  color: var(--data);
  font-size: .875rem;
  line-height: 1.6;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 大屏端配图 ---------- */

.page-faq .faq-tv-media {
  margin: 14px 0 0;
}

.page-faq .faq-tv-media .media {
  border: var(--line-w) solid var(--line);
  box-shadow: var(--shadow-hard);
}

/* ---------- 侧栏 ---------- */

.page-faq .faq-aside {
  border: var(--line-w) solid var(--line);
  background: var(--deep);
  padding: 18px;
}

.page-faq .faq-aside__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .faq-aside__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-aside__list a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 9px 8px 9px 0;
  border-bottom: 1px solid rgba(44, 62, 56, .8);
  color: var(--snow);
  font-size: .9375rem;
  line-height: 1.55;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

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

.page-faq .faq-aside__list .mono {
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--data);
}

.page-faq .faq-aside__tip {
  display: grid;
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 2px solid var(--line);
}

.page-faq .faq-aside__tip p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-aside__tip .btn {
  justify-self: start;
  text-decoration: none;
}

/* ---------- 底部求助 ---------- */

.page-faq .faq-help {
  padding-bottom: clamp(44px, 8vw, 92px);
}

.page-faq .faq-help__panel {
  display: grid;
  gap: 20px;
  padding: clamp(20px, 4vw, 34px);
}

.page-faq .faq-help__copy h2 {
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.25;
}

.page-faq .faq-help__copy p {
  max-width: 46em;
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

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

.page-faq .faq-help__actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-answer {
    grid-template-columns: minmax(0, 1fr) minmax(170px, 220px);
    gap: 24px;
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-faq .faq-hero__media {
    margin-top: 12px;
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 7fr) minmax(240px, 3fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-num,
  .page-faq .faq-q,
  .page-faq .faq-sign,
  .page-faq .faq-aside__list a {
    transition: none;
  }
}