.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 32px);
  --faq-radius: 20px;
  --faq-panel-open: #164035;
  --faq-line: var(--ob-line);
  background: var(--ob-ink);
  color: var(--ob-bone);
  padding: clamp(18px, 3.4vw, 40px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .ob-crumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  max-width: 880px;
  padding-bottom: clamp(26px, 4vw, 46px);
}

.page-faq .faq-intro .ob-h1 {
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.02em;
  margin: 14px 0 0;
}

.page-faq .faq-intro .ob-lead {
  margin-top: 18px;
  color: var(--ob-bone);
  opacity: .88;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
}

.page-faq .faq-intro__quick {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-intro__quick a {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  color: var(--ob-bone);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--ob-dur) var(--ob-ease), border-color var(--ob-dur) var(--ob-ease), background var(--ob-dur) var(--ob-ease);
}

.page-faq .faq-intro__quick a:hover,
.page-faq .faq-intro__quick a:focus-visible {
  color: var(--ob-yellow);
  border-color: var(--ob-yellow);
  background: rgba(255, 199, 58, .09);
}

/* ---------- 章节头 ---------- */
.page-faq .faq-sect {
  margin-top: clamp(34px, 5vw, 62px);
}

.page-faq .faq-sect-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faq-line);
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-sect-title {
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-sect-note {
  margin: 0;
  font-family: var(--ob-font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ob-slate);
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-step {
  display: block;
  padding: 22px 22px 20px;
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  background: var(--ob-panel);
  color: inherit;
  text-decoration: none;
  transition: transform var(--ob-dur) var(--ob-ease), background var(--ob-dur) var(--ob-ease), border-color var(--ob-dur) var(--ob-ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-visible {
  transform: translateY(-2px);
  background: var(--ob-panel-2);
  border-color: var(--ob-yellow);
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--ob-font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ob-yellow);
}

.page-faq .faq-step__title {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ob-slate);
}

.page-faq .faq-step__go {
  display: block;
  margin-top: 16px;
  font-family: var(--ob-font-mono);
  font-size: 12px;
  color: var(--ob-bone);
}

.page-faq .faq-figure {
  margin: var(--faq-gap) 0 0;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: clamp(28px, 4.4vw, 54px) 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-group__label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .08em;
  color: var(--ob-bone);
}

.page-faq .faq-group__label span {
  font-family: var(--ob-font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--ob-yellow);
}

.page-faq .faq-group__body {
  min-width: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  background: var(--ob-panel);
  border: 1px solid var(--ob-line-soft);
  border-left: 3px solid transparent;
  border-radius: var(--faq-radius);
  transition: border-color var(--ob-dur) var(--ob-ease), background var(--ob-dur) var(--ob-ease);
}

.page-faq .faq-item:hover {
  border-color: var(--ob-line);
  border-left-color: var(--ob-panel-2);
}

.page-faq .faq-item[open] {
  background: var(--faq-panel-open);
  border-left-color: var(--ob-yellow);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ob-bone);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ob-font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--ob-yellow);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2013";
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--ob-yellow);
  outline-offset: 3px;
  border-radius: var(--faq-radius);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--ob-font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ob-slate);
}

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

.page-faq .faq-item__a {
  padding: 0 22px 20px 48px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(233, 230, 222, .86);
}

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

.page-faq .faq-inline {
  font-family: var(--ob-font-mono);
  font-size: 13px;
  color: var(--ob-yellow);
  background: rgba(255, 199, 58, .12);
  padding: 1px 7px;
  border-radius: 6px;
}

.page-faq .faq-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  vertical-align: middle;
}

.page-faq .faq-dot--yellow {
  background: var(--ob-yellow);
}

.page-faq .faq-dot--red {
  background: var(--ob-red);
}

/* ---------- 支持区块 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(36px, 5vw, 66px);
  padding: clamp(22px, 3.4vw, 40px);
  border: 1px solid var(--faq-line);
  border-radius: var(--ob-radius-lg);
  background: linear-gradient(135deg, var(--ob-panel) 0%, #0F2A23 60%, var(--ob-ink) 100%);
}

.page-faq .faq-help__title {
  margin: 0;
  font-size: clamp(21px, 2.8vw, 28px);
  font-weight: 800;
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(233, 230, 222, .85);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 15.5px;
  font-family: var(--ob-font-mono);
}

.page-faq .faq-help__k {
  flex: 0 0 56px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ob-slate);
}

.page-faq .faq-help__item a {
  color: var(--ob-yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 199, 58, .4);
}

.page-faq .faq-help__item a:hover,
.page-faq .faq-help__item a:focus-visible {
  border-bottom-color: var(--ob-yellow);
}

.page-faq .faq-help__action {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-help__note {
  flex: 1 0 100%;
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ob-slate);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-steps__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-group {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 48px);
  }

  .page-faq .faq-group__label {
    writing-mode: vertical-rl;
    letter-spacing: .2em;
    color: var(--ob-bone);
  }

  .page-faq .faq-group__label span {
    letter-spacing: .3em;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-item__a {
    max-width: 74ch;
  }
}

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

  .page-faq .faq-step:hover {
    transform: none;
  }
}