.page-faq {
  --faq-gap: clamp(24px, 3.4vw, 44px);
  --faq-rule: 1px solid var(--hh-line);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 3.6vw, 48px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(22px, 3vw, 40px);
}

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

.page-faq .faq-hero h1 {
  font-family: var(--hh-font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--hh-white);
  margin: 12px 0 18px;
}

.page-faq .faq-hero__hl {
  color: var(--hh-cyan);
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 3px solid rgba(31, 245, 192, 0.35);
}

.page-faq .faq-hero__lede {
  color: var(--hh-mist);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.82;
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
  min-width: 0;
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 52px;
  height: 52px;
  border-top: 2px solid var(--hh-cyan);
  border-right: 2px solid var(--hh-cyan);
  pointer-events: none;
  z-index: 2;
}

.page-faq .faq-hero__cap {
  margin: 12px 0 0;
  font-family: var(--hh-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--hh-mist);
}

.page-faq .hh-media {
  position: relative;
  overflow: hidden;
  background: var(--hh-deep);
}

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

.page-faq .hh-media--4x3 {
  aspect-ratio: 4 / 3;
}

.page-faq .hh-media--tint::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 18, 0.05) 40%, rgba(6, 26, 18, 0.55));
  pointer-events: none;
}

/* ---------- 通用区块标题 ---------- */
.page-faq .faq-head {
  display: grid;
  gap: 10px;
  max-width: 64ch;
  margin-bottom: clamp(24px, 3.2vw, 40px);
}

.page-faq .faq-head h2 {
  font-family: var(--hh-font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.005em;
  color: var(--hh-white);
  margin: 0;
}

.page-faq .faq-head__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--hh-mist);
}

/* ---------- 八个高频问题 ---------- */
.page-faq .faq-quick {
  padding: clamp(40px, 5.4vw, 76px) 0;
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
  background: linear-gradient(180deg, rgba(10, 42, 29, 0.85), rgba(6, 26, 18, 0));
}

.page-faq .faq-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hh-line);
  border: var(--faq-rule);
}

.page-faq .faq-quick__item {
  background: var(--hh-ink);
  padding: clamp(18px, 2.2vw, 26px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 12px;
}

.page-faq .faq-quick__item:hover {
  background: var(--hh-deep);
}

.page-faq .faq-quick__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--hh-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--hh-cyan);
  padding-top: 0.28em;
  opacity: 0.85;
}

.page-faq .faq-quick__q {
  grid-column: 2;
  margin: 0;
  font-family: var(--hh-font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--hh-white);
}

.page-faq .faq-quick__a {
  grid-column: 2;
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--hh-mist);
}

/* ---------- 目录 + 答案双栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(40px, 5vw, 76px);
}

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

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: var(--faq-rule);
  font-family: var(--hh-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--hh-mist);
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 9px 10px 9px 13px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.45;
  color: var(--hh-mist);
  text-decoration: none;
  transition: color 0.2s var(--hh-ease), border-color 0.2s var(--hh-ease), background-color 0.2s var(--hh-ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--hh-white);
  background: var(--hh-raise);
  outline: none;
}

.page-faq .faq-rail__link:focus-visible {
  box-shadow: 0 0 0 2px var(--hh-cyan);
}

.page-faq .faq-rail__link.is-active,
.page-faq .faq-rail__link[aria-current="true"] {
  color: var(--hh-cyan);
  border-left-color: var(--hh-cyan);
  background: rgba(31, 245, 192, 0.07);
}

.page-faq .faq-rail__no {
  font-family: var(--hh-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--hh-mist);
  opacity: 0.7;
}

.page-faq .faq-rail__link.is-active .faq-rail__no,
.page-faq .faq-rail__link[aria-current="true"] .faq-rail__no {
  color: var(--hh-cyan);
  opacity: 1;
}

.page-faq .faq-rail__meta {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: var(--faq-rule);
  font-size: 12.5px;
  line-height: 1.66;
  color: var(--hh-mist);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(36px, 4.6vw, 66px);
  min-width: 0;
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--hh-header-h) + 24px);
}

.page-faq .faq-group__head {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: var(--faq-rule);
  margin-bottom: 2px;
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 68px;
  height: 2px;
  background: var(--hh-cyan);
}

.page-faq .faq-group__no {
  font-family: var(--hh-font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1;
  padding-top: 5px;
  color: var(--hh-cyan);
  opacity: 0.55;
}

.page-faq .faq-group__head h2 {
  font-family: var(--hh-font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.7vw, 30px);
  line-height: 1.14;
  letter-spacing: -0.005em;
  color: var(--hh-white);
  margin: 0 0 8px;
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--hh-mist);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-bottom: var(--faq-rule);
  border-left: 2px solid transparent;
  transition: border-color 0.22s var(--hh-ease), background-color 0.22s var(--hh-ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--hh-cyan);
  background: rgba(16, 59, 42, 0.42);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 18px 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.52;
  color: var(--hh-white);
  transition: color 0.2s var(--hh-ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--hh-cyan);
  outline-offset: -3px;
}

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

.page-faq .faq-item__mark {
  position: relative;
  width: 24px;
  height: 24px;
  flex: none;
}

.page-faq .faq-item__mark::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--hh-cyan);
  border-bottom: 2px solid var(--hh-cyan);
  transform: translate(-50%, -70%) rotate(45deg);
  transition: transform 0.26s var(--hh-ease);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  transform: translate(-50%, -30%) rotate(225deg);
}

.page-faq .faq-item__a {
  padding: 0 22px 22px 20px;
  animation: faq-open 0.3s var(--hh-ease) both;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.84;
  color: var(--hh-mist);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 角球口径示意图 ---------- */
.page-faq .faq-figure {
  margin: clamp(24px, 3vw, 36px) 0 6px;
  display: grid;
  gap: 12px;
}

.page-faq .faq-figure__cap {
  margin: 0;
  font-size: 13px;
  line-height: 1.74;
  color: var(--hh-mist);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-assist {
  padding: clamp(40px, 5.4vw, 76px) 0 clamp(16px, 2vw, 28px);
  scroll-margin-top: calc(var(--hh-header-h) + 24px);
}

.page-faq .faq-assist__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 3.6vw, 52px);
  padding: clamp(26px, 3.6vw, 52px);
  background: linear-gradient(150deg, var(--hh-raise), var(--hh-deep) 62%, var(--hh-ink));
  border: var(--faq-rule);
}

.page-faq .faq-assist__inner::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--hh-cyan);
  border-right: 2px solid var(--hh-cyan);
  opacity: 0.7;
  pointer-events: none;
}

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

.page-faq .faq-assist__copy h2 {
  font-family: var(--hh-font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.005em;
  color: var(--hh-white);
  margin: 10px 0 14px;
}

.page-faq .faq-assist__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hh-mist);
}

.page-faq .faq-assist__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-assist__contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--faq-rule);
  min-width: 0;
}

.page-faq .faq-assist__row {
  display: grid;
  grid-template-columns: minmax(82px, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: var(--faq-rule);
}

.page-faq .faq-assist__key {
  font-family: var(--hh-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hh-mist);
}

.page-faq .faq-assist__value {
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--hh-white);
  overflow-wrap: anywhere;
}

.page-faq a.faq-assist__value {
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 245, 192, 0.4);
  transition: color 0.2s var(--hh-ease), border-color 0.2s var(--hh-ease);
}

.page-faq a.faq-assist__value:hover,
.page-faq a.faq-assist__value:focus-visible {
  color: var(--hh-cyan);
  border-bottom-color: var(--hh-cyan);
  outline: none;
}

.page-faq a.faq-assist__value:focus-visible {
  box-shadow: 0 0 0 2px var(--hh-cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-figure {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: end;
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--hh-header-h) + 20px);
  }

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

@media (min-width: 1240px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 699px) {
  .page-faq .faq-item__q {
    padding: 16px 14px 16px 16px;
    font-size: 15px;
  }

  .page-faq .faq-item__a {
    padding: 0 16px 20px;
  }

  .page-faq .faq-assist__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__mark::before,
  .page-faq .faq-rail__link,
  .page-faq .faq-item__q {
    transition-duration: 0.01ms;
  }
}