.page-faq {
  --faq-pad: clamp(20px, 3.4vw, 40px);
  --faq-gap: clamp(24px, 4vw, 44px);
  background: var(--deep-night);
  color: var(--cool-white);
  overflow-x: hidden;
}

.page-faq .container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(24px, 4vw, 52px);
  border-bottom: 1px solid var(--deep-line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(233, 242, 236, 0.05) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(233, 242, 236, 0.05) 0 1px, transparent 1px 76px);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 90%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 90%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: end;
}

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

.page-faq .faq-hero__copy .breadcrumb {
  margin-bottom: 20px;
}

.page-faq .faq-hero__copy .label-caps {
  display: block;
  color: var(--neon-dim);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  font-size: var(--fs-h1);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 38ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--grey-green);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stats .stat-figure {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-hero__stats .stat-figure__value {
  font-size: 30px;
  line-height: 1;
  color: var(--cool-white);
}

.page-faq .faq-hero__stats .stat-figure--anchor {
  color: var(--neon-lime);
  border-bottom: 2px solid var(--neon-lime);
  padding-bottom: 2px;
}

.page-faq .faq-hero__stats .stat-figure__label {
  font-size: var(--fs-note);
  color: var(--grey-green);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  background: var(--panel-green);
  aspect-ratio: 10 / 7;
}

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

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-block: clamp(20px, 3vw, 28px);
}

.page-faq .faq-index__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px 9px 14px;
  border: 1px solid var(--deep-line);
  border-radius: var(--radius-pill);
  text-decoration: none;
  color: var(--grey-green);
  font-size: var(--fs-note);
  transition: border-color 200ms ease, color 200ms ease, background-color 200ms ease;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  border-color: var(--neon-dim);
  color: var(--neon-lime);
  background: rgba(198, 242, 76, 0.07);
  outline: none;
}

.page-faq .faq-index__num {
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--neon-dim);
}

.page-faq .faq-index__item:hover .faq-index__num,
.page-faq .faq-index__item:focus-visible .faq-index__num {
  color: var(--neon-lime);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding-block: clamp(38px, 6vw, 72px);
  border-bottom: 1px solid var(--deep-line);
}

.page-faq .faq-group--alt {
  background: var(--panel-green);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-group__num {
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1;
  color: var(--neon-lime);
  letter-spacing: -0.02em;
}

.page-faq .faq-group__head h2 {
  font-size: var(--fs-h2);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 54ch;
  font-size: var(--fs-note);
  line-height: 1.7;
  color: var(--grey-green);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--deep-line);
}

.page-faq .faq-item:first-child {
  border-top: 1px solid var(--deep-line);
}

.page-faq .faq-q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 600;
  line-height: 1.5;
  transition: color 200ms ease;
}

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

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

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--neon-lime);
  outline: none;
}

.page-faq .faq-q__mark {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--neon-dim);
  border-bottom: 2px solid var(--neon-dim);
  transform: rotate(-45deg);
  transition: transform 240ms ease, border-color 240ms ease;
}

.page-faq .faq-item[open] .faq-q__mark {
  transform: rotate(45deg);
  border-color: var(--neon-lime);
}

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

.page-faq .faq-a {
  max-width: 68ch;
  padding: 0 4px 22px 23px;
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-reveal 240ms ease-out;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-a p {
  margin: 0 0 10px;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(233, 242, 236, 0.88);
}

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

/* ---------- 横竖屏分组内的图 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-figure {
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  background: var(--deep-night);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure .media-frame__caption {
  display: block;
  padding: 14px 20px 18px;
  font-size: var(--fs-note);
  line-height: 1.65;
  color: var(--grey-green);
}

/* ---------- 术语表 ---------- */
.page-faq .glossary {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .glossary__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 14px 2px;
  border-bottom: 1px dotted var(--deep-line);
  transition: background-color 200ms ease;
}

.page-faq .glossary__row:first-child {
  border-top: 1px dotted var(--deep-line);
}

.page-faq .glossary__row:hover {
  background: rgba(198, 242, 76, 0.05);
}

.page-faq .glossary__term {
  flex: 0 0 auto;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--cool-white);
  transition: color 200ms ease;
}

.page-faq .glossary__row:hover .glossary__term {
  color: var(--neon-lime);
}

.page-faq .glossary__def {
  flex: 1 1 220px;
  margin: 0;
  font-size: var(--fs-note);
  line-height: 1.65;
  color: var(--grey-green);
}

/* ---------- 未解决提交区 ---------- */
.page-faq .faq-group--submit {
  border-bottom: none;
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-faq .submit-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .submit-panel__copy .label-caps {
  display: block;
  color: var(--neon-dim);
  margin-bottom: 12px;
}

.page-faq .submit-panel__copy h2 {
  font-size: var(--fs-h2);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  max-width: 24ch;
}

.page-faq .submit-panel__copy > p {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--grey-green);
}

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

.page-faq .submit-list__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--deep-line);
  font-size: var(--fs-body);
  line-height: 1.6;
}

.page-faq .submit-list__item:first-child {
  border-top: 1px solid var(--deep-line);
}

.page-faq .submit-list__num {
  flex: 0 0 auto;
  font-size: var(--fs-label);
  color: var(--neon-dim);
  letter-spacing: 0.04em;
}

.page-faq .submit-panel__aside {
  padding: var(--faq-pad);
  border-radius: var(--radius-panel);
  background: var(--panel-green);
  border-left: 3px solid var(--steal-orange);
}

.page-faq .submit-panel__note {
  margin: 0 0 22px;
  font-size: var(--fs-note);
  line-height: 1.7;
  color: var(--cool-white);
}

.page-faq .submit-panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .submit-panel__extra {
  margin: 22px 0 0;
  font-size: var(--fs-note);
  line-height: 1.7;
  color: var(--grey-green);
}

.page-faq .submit-panel__extra a {
  color: var(--neon-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .submit-panel__extra a:hover,
.page-faq .submit-panel__extra a:focus-visible {
  color: var(--neon-dim);
  outline: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .glossary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .glossary__row:nth-child(2) {
    border-top: 1px dotted var(--deep-line);
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
  }

  .page-faq .faq-hero h1 {
    max-width: 22ch;
  }

  .page-faq .submit-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
  }

  .page-faq .faq-figure {
    position: sticky;
    top: 110px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-q {
    padding-block: 20px;
  }
}