.page-faq {
  --faq-gap: clamp(20px, 3.6vw, 40px);
  --faq-card-bg: linear-gradient(170deg, var(--ink-2), var(--ink-1));
  background:
    radial-gradient(760px 380px at 88% -6%, rgba(23, 230, 194, .13), transparent 68%),
    var(--ink-0);
  color: var(--paper);
  overflow-x: hidden;
}

.page-faq .breadcrumbs {
  padding-top: clamp(14px, 2.4vw, 22px);
}

.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 46px) 0 clamp(34px, 6vw, 72px);
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: min(520px, 76vw);
  height: min(520px, 76vw);
  background: radial-gradient(circle, rgba(14, 158, 134, .22), transparent 66%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  max-width: 18ch;
  letter-spacing: .01em;
  line-height: 1.04;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin-top: var(--space-2);
  max-width: 62ch;
  color: var(--mute);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: var(--space-2) 0 0;
  padding: 0;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--mute);
}

.page-faq .faq-hero__facts b {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .section-head {
  max-width: 68ch;
}

.page-faq .section-head .lede {
  color: var(--mute);
}

/* 01 三步技能树 */
.page-faq .faq-steps {
  padding-block: clamp(30px, 5vw, 64px);
  background: linear-gradient(180deg, transparent, rgba(11, 31, 25, .72) 22%, transparent);
}

.page-faq .faq-steps__body {
  display: grid;
  gap: var(--faq-gap);
  margin-top: var(--space-3);
}

.page-faq .faq-steps__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-faq .faq-steps__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .step-tree {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-faq .step-tree__item {
  position: relative;
  flex: 0 0 82%;
  scroll-snap-align: start;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--faq-card-bg);
  transition: border-color .2s ease, transform .2s ease;
}

.page-faq .step-tree__item:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.page-faq .step-tree__no {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--teal);
  color: var(--cyan);
  font-size: 17px;
  font-weight: 600;
  background: var(--cyan-soft);
}

.page-faq .step-tree__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .step-tree__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

/* 02 筛选与回看 */
.page-faq .faq-filter {
  padding-block: clamp(30px, 5vw, 64px);
}

.page-faq .faq-filter__grid {
  align-items: center;
  gap: var(--faq-gap);
}

.page-faq .faq-filter__text .lede {
  color: var(--mute);
}

.page-faq .faq-filter__list {
  list-style: none;
  margin: var(--space-2) 0 var(--space-2);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-filter__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mute);
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-filter__list .tag {
  white-space: nowrap;
}

.page-faq .filter-demo {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(200deg, rgba(16, 42, 34, .94), rgba(6, 17, 14, .94));
  box-shadow: inset 0 0 0 1px rgba(23, 230, 194, .06);
}

.page-faq .filter-demo__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-faq .filter-demo__head + .filter-demo__chips,
.page-faq .filter-demo__head + .filter-demo__days {
  margin-bottom: 20px;
}

.page-faq .filter-demo__label {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-faq .filter-demo__hint {
  font-size: 12px;
  color: var(--mute);
}

.page-faq .filter-demo__days {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.page-faq .filter-demo__day {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mute);
}

.page-faq .filter-demo__day.is-active {
  border-color: var(--cyan);
  color: var(--ink-0);
  background: var(--cyan);
  font-weight: 600;
}

.page-faq .filter-demo__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-demo__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--mute);
  letter-spacing: .04em;
}

/* 03 刷新与数据 */
.page-faq .faq-signal {
  padding-block: clamp(30px, 5vw, 64px);
  background: linear-gradient(180deg, transparent, rgba(11, 31, 25, .6) 30%, transparent);
}

.page-faq .signal-grid {
  display: grid;
  gap: 14px;
  margin-top: var(--space-3);
}

.page-faq .signal-card {
  position: relative;
  padding: 22px 20px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--ink-1);
  overflow: hidden;
  transition: transform .2s ease, border-color .2s ease;
}

.page-faq .signal-card:hover {
  transform: translateY(-2px);
  border-color: var(--teal);
}

.page-faq .signal-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
}

.page-faq .signal-card--cyan::before { background: var(--cyan); }
.page-faq .signal-card--amber::before { background: var(--amber); }
.page-faq .signal-card--danger::before { background: var(--danger); }

.page-faq .signal-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--paper);
}

.page-faq .signal-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

.page-faq .signal-card__tag {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute);
}

.page-faq .signal-card--cyan .signal-card__tag {
  color: var(--cyan);
  border-color: var(--cyan-mid);
}

.page-faq .signal-card--amber .signal-card__tag {
  color: var(--amber);
  border-color: rgba(255, 177, 61, .38);
}

.page-faq .signal-card--danger .signal-card__tag {
  color: var(--danger);
  border-color: rgba(255, 122, 107, .36);
}

.page-faq .faq-signal__foot {
  margin-top: var(--space-2);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mute);
}

/* 04 赛前清单 */
.page-faq .faq-check {
  padding-block: clamp(30px, 5vw, 64px);
}

.page-faq .checklist {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .checklist__item {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--faq-card-bg);
  transition: transform .2s ease, border-color .2s ease;
}

.page-faq .checklist__item:hover {
  transform: translateY(-2px);
  border-color: var(--teal);
}

.page-faq .checklist__box {
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 2px solid var(--teal);
  border-radius: 6px;
  background: var(--cyan-soft);
}

.page-faq .checklist__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(42deg);
}

.page-faq .checklist__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .checklist__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

/* 05 资料库 */
.page-faq .faq-lib {
  padding-block: clamp(30px, 5vw, 64px);
  background: linear-gradient(180deg, transparent, rgba(16, 42, 34, .5) 40%, transparent);
}

.page-faq .faq-lib__grid {
  align-items: start;
  gap: var(--faq-gap);
}

.page-faq .faq-lib__text .lede {
  color: var(--mute);
  margin-bottom: var(--space-2);
}

.page-faq .lib-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .lib-path__step {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-s);
  background: rgba(6, 17, 14, .6);
}

.page-faq .lib-path__mark {
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .lib-path__step h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .lib-path__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
}

/* 06 常见问题 */
.page-faq .faq-help {
  padding-block: clamp(30px, 5vw, 64px);
}

.page-faq .faq-help__head {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-help__head .lede {
  color: var(--mute);
}

.page-faq .faq-help__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-faq .faq-help__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-accordion {
  margin-top: var(--space-3);
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--ink-1);
  overflow: hidden;
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-item[open] {
  border-color: var(--teal);
  background: var(--ink-2);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
}

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

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

.page-faq .faq-item__num {
  flex: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--teal);
  padding-top: 3px;
}

.page-faq .faq-item__a {
  padding: 0 18px 18px 48px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
}

/* 07 联系 */
.page-faq .faq-contact {
  padding-block: clamp(30px, 5vw, 70px);
}

.page-faq .faq-contact__panel {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background:
    linear-gradient(120deg, rgba(23, 230, 194, .10), transparent 46%),
    linear-gradient(200deg, var(--ink-2), var(--ink-1));
}

.page-faq .faq-contact__text .lede {
  color: var(--mute);
}

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

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__row .mono {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--teal);
  text-transform: uppercase;
}

.page-faq .faq-contact__btn {
  justify-self: start;
  margin-top: 6px;
}

@media (min-width: 640px) {
  .page-faq .signal-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 96px 1fr;
    align-items: baseline;
    gap: 12px;
  }
}

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

  .page-faq .step-tree {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .step-tree__item {
    width: auto;
    margin-bottom: 16px;
  }

  .page-faq .step-tree__item::after {
    content: "";
    position: absolute;
    left: 38px;
    top: 60px;
    bottom: -18px;
    width: 1px;
    background: linear-gradient(180deg, var(--teal), transparent);
  }

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

  .page-faq .step-tree__item:last-child::after {
    display: none;
  }

  .page-faq .faq-help__head {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-faq .faq-contact__panel {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-faq .faq-item__q {
    padding: 18px 22px;
  }

  .page-faq .faq-item__a {
    padding: 0 22px 20px 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-tree__item,
  .page-faq .signal-card,
  .page-faq .checklist__item {
    transition: none;
  }

  .page-faq .step-tree__item:hover,
  .page-faq .signal-card:hover,
  .page-faq .checklist__item:hover {
    transform: none;
  }
}