.page-faq {
  --faq-rail: rgba(244, 247, 250, 0.04);
  --faq-step-bg: rgba(200, 255, 247, 0.05);
  --faq-tint-a: rgba(34, 227, 210, 0.10);
  --faq-tint-b: rgba(138, 92, 255, 0.10);
  --faq-tint-c: rgba(255, 61, 139, 0.10);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: calc(-1 * var(--header-h));
  padding-top: calc(var(--header-h) + clamp(46px, 8vw, 108px));
  padding-bottom: clamp(46px, 7vw, 92px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -20% -12% auto -12%;
  height: 150%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 80% 10%, rgba(34, 227, 210, 0.17), transparent 70%),
    radial-gradient(46% 48% at 10% 26%, rgba(255, 61, 139, 0.13), transparent 72%),
    radial-gradient(42% 44% at 52% 96%, rgba(138, 92, 255, 0.13), transparent 70%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-cyan) 22%, var(--line-magenta) 78%, transparent);
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero .bjj-breadcrumb {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-faq .faq-hero .bjj-title--xl {
  margin: 12px 0 clamp(18px, 3vw, 28px);
  max-width: 20ch;
  line-height: 1.06;
}

.page-faq .faq-hero .bjj-lead {
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: clamp(28px, 4.5vw, 46px) 0 0;
  padding: clamp(20px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-faq .faq-hero__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--graphite-2);
}

/* ---------- 通用小节标题 ---------- */

.page-faq .faq-head {
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-faq .faq-head .bjj-eyebrow {
  margin-bottom: 12px;
}

.page-faq .faq-head .bjj-title {
  margin: 0 0 12px;
}

.page-faq .faq-head .bjj-lead {
  margin: 0;
  max-width: 58ch;
}

/* ---------- 五分钟上手 ---------- */

.page-faq .faq-start .bjj-shell {
  padding-top: clamp(6px, 2vw, 18px);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-step {
  position: relative;
  padding: 26px 22px 28px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-cyan);
  background: linear-gradient(158deg, var(--faq-tint-a), var(--ink-2) 62%);
  box-shadow: var(--shadow-soft);
  min-width: 0;
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 16px;
}

.page-faq .faq-step__title {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--graphite-2);
}

/* ---------- 分段面板 ---------- */

.page-faq .faq-tabs__list {
  display: flex;
  gap: clamp(14px, 3vw, 34px);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 4vw, 44px);
  padding: 0;
  scrollbar-width: thin;
}

.page-faq .faq-tabs__list::-webkit-scrollbar {
  height: 2px;
}

.page-faq .faq-tabs__list::-webkit-scrollbar-thumb {
  background: var(--line-cyan);
}

.page-faq .faq-tabs__btn {
  position: relative;
  flex: none;
  appearance: none;
  background: none;
  border: 0;
  padding: 14px 2px 16px;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--graphite);
  cursor: pointer;
  white-space: nowrap;
  transition: color 200ms var(--ease);
}

.page-faq .faq-tabs__btn::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 240ms var(--ease);
}

.page-faq .faq-tabs__btn:hover,
.page-faq .faq-tabs__btn:focus-visible {
  color: var(--mist);
}

.page-faq .faq-tabs__btn[aria-selected="true"] {
  color: var(--mist);
  font-weight: 700;
}

.page-faq .faq-tabs__btn[aria-selected="true"]::after {
  transform: scaleX(1);
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}

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

/* 问题索引 */

.page-faq .faq-index {
  background: var(--faq-rail);
  border: 1px solid var(--line);
  padding: 18px 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--graphite);
}

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

.page-faq .faq-index__link {
  display: block;
  padding: 9px 10px;
  font-size: 14px;
  line-height: 1.58;
  color: var(--graphite-2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--mist);
  border-left-color: var(--cyan);
  background-color: rgba(34, 227, 210, 0.07);
}

/* 问答条目 */

.page-faq .faq-item {
  border-top: 1px solid var(--line-soft);
  padding: clamp(20px, 3vw, 28px) 0;
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .faq-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-q {
  display: flex;
  gap: 12px;
  align-items: baseline;
  margin: 0 0 12px;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-q__mark {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--magenta);
}

.page-faq .faq-a {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite-2);
}

/* 步骤底板 */

.page-faq .faq-stepbox {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin: 14px 0 0;
  padding: 14px 16px;
  background: var(--faq-step-bg);
  border-left: 2px solid var(--line-cyan);
}

.page-faq .faq-stepbox__n {
  flex: none;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-stepbox__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* 配图 */

.page-faq .faq-figure {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
}

.page-faq .faq-figure__media {
  border: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(135deg, var(--faq-tint-a), var(--faq-tint-b) 55%, var(--faq-tint-c));
}

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

.page-faq .faq-figure__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-cta .faq-cta__box {
  display: grid;
  gap: 22px;
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--faq-tint-a), var(--ink-2) 48%, var(--faq-tint-c));
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-cta__text .bjj-eyebrow {
  margin-bottom: 12px;
}

.page-faq .faq-cta__text .bjj-title {
  margin: 0 0 12px;
}

.page-faq .faq-cta__text .bjj-lead {
  margin: 0;
  max-width: 52ch;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 800px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-cta .faq-cta__box {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(200px, 268px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tabs__btn,
  .page-faq .faq-tabs__btn::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}