.page-faq {
  --faq-rail-w: 216px;
  --faq-stripe: repeating-linear-gradient(90deg, var(--line) 0 10px, transparent 10px 20px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* 面包屑 */
.page-faq .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
  display: flex;
  gap: 8px;
  align-items: center;
}

.page-faq .breadcrumb a {
  color: var(--mute);
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--lime);
}

.page-faq .breadcrumb__sep {
  color: var(--line);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(95% 130% at 10% 0%, rgba(28, 58, 49, 0.92) 0%, rgba(28, 58, 49, 0) 62%),
    linear-gradient(150deg, rgba(15, 42, 40, 0.55) 0%, rgba(10, 20, 17, 0) 70%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  padding: clamp(30px, 5vw, 58px) 0 clamp(36px, 6vw, 66px);
}

.page-faq .faq-hero__title {
  margin: 18px 0 20px;
  font-size: clamp(34px, 6.2vw, 62px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 17em;
}

.page-faq .faq-hero__lead {
  max-width: 40em;
  color: var(--mute);
}

.page-faq .faq-hero__quick {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-faq .faq-hero__quick li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  background: var(--ink-2);
  transition: background 180ms var(--ease);
}

.page-faq .faq-hero__quick li:hover {
  background: var(--field);
}

.page-faq .faq-hero__quick strong {
  display: block;
  font-size: 15px;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__quick p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mute);
}

.page-faq .faq-hero__quick-no {
  font-size: 12px;
  color: var(--lime);
  padding-top: 3px;
}

/* 快速排查 */
.page-faq .faq-check__head {
  margin-bottom: 24px;
}

.page-faq .faq-check__lead {
  font-size: 14px;
}

.page-faq .faq-check__figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

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

.page-faq .faq-check__item {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color 180ms var(--ease);
}

.page-faq .faq-check__item:hover {
  border-bottom-color: var(--lime);
}

.page-faq .faq-check__no {
  font-size: 20px;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-check__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-check__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-check__more {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

/* 问答主体 */
.page-faq .faq-qa__head {
  margin-bottom: 28px;
}

.page-faq .faq-qa__lead {
  font-size: 14px;
}

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

.page-faq .faq-rail {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-faq .faq-rail__title {
  display: none;
}

.page-faq .faq-rail__link {
  flex: 0 0 auto;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--mute);
  text-decoration: none;
  white-space: nowrap;
  border-left: 2px solid transparent;
  border-radius: var(--r-xs);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-rail__link:hover {
  color: var(--paper);
}

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

.page-faq .faq-rail__link[aria-current="true"] {
  color: var(--lime);
  border-left-color: var(--lime);
}

/* 筛选条 */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 0 0 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--field);
}

.page-faq .filter-chip {
  min-height: 34px;
  padding: 6px 14px;
  font: inherit;
  font-size: 13px;
  color: var(--mute);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  cursor: pointer;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .filter-chip:hover {
  color: var(--paper);
  border-color: var(--lime);
}

.page-faq .filter-chip:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .filter-chip[aria-pressed="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
  font-weight: 700;
}

.page-faq .filter-status {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-faq .faq-item[data-visible="false"] {
  display: none;
}

/* 分组 */
.page-faq .faq-group + .faq-group {
  position: relative;
  margin-top: 56px;
  padding-top: 28px;
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background-image: var(--faq-stripe);
  opacity: 0.85;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  padding-bottom: 12px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}

/* 折叠问答 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > .fold__head {
  position: relative;
  display: block;
  padding: 18px 46px 18px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color 180ms var(--ease);
}

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

.page-faq .faq-item > .fold__head::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
}

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

.page-faq .faq-item > .fold__head:hover {
  color: var(--lime);
}

.page-faq .faq-item > .fold__head:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-item > .fold__body {
  padding: 0 46px 22px 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
}

.page-faq .faq-item > .fold__body p {
  margin: 0 0 8px;
  max-width: 46em;
}

.page-faq .faq-item > .fold__body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item > .fold__body a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item[open] > .fold__body {
  animation: faq-drop 220ms var(--ease);
}

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

.page-faq .faq-fav__figure {
  margin: 22px 0 6px;
}

/* 还没解决 */
.page-faq .faq-contact__inner {
  display: grid;
  gap: 24px;
}

.page-faq .faq-contact__lead {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
}

.page-faq .faq-contact__channels {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-faq .faq-contact__channels li {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--ink-2);
  transition: background 180ms var(--ease);
}

.page-faq .faq-contact__channels li:hover {
  background: var(--field);
}

.page-faq .faq-contact__channels .mono {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.page-faq .faq-contact__channels li > span:last-child {
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__side {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-contact__side p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .faq-contact__side .btn {
  justify-self: start;
}

.page-faq .path-bar {
  margin-top: clamp(48px, 7vw, 88px);
}

/* 响应式 */
@media (min-width: 620px) {
  .page-faq .faq-contact__channels li {
    grid-template-columns: 88px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-check__item {
    grid-template-columns: 72px minmax(0, 1fr) minmax(0, 1.5fr) 210px;
    align-items: baseline;
    gap: 24px;
  }

  .page-faq .faq-check__more {
    text-align: right;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 5fr 7fr;
    align-items: end;
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: 44px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-qa__grid {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-rail {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    position: sticky;
    top: 120px;
    align-self: start;
    padding: 4px 0 4px 14px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-rail__title {
    display: block;
    margin: 0 0 12px -14px;
    padding-left: 14px;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--mute);
  }

  .page-faq .faq-rail__link {
    padding: 7px 10px;
    margin-left: -16px;
    border-left: 2px solid transparent;
    border-radius: 0 var(--r-xs) var(--r-xs) 0;
  }
}