.page-faq {
  --faq-line: var(--line);
  --faq-panel: rgba(11, 31, 51, .62);
  --faq-panel-deep: rgba(4, 16, 25, .86);
  color: var(--mist);
  background: var(--ink);
  padding-bottom: clamp(2.6rem, 7vw, 5rem);
}

.page-faq .breadcrumbs {
  padding-block: clamp(.9rem, 3vw, 1.4rem) 0;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--faq-line);
  padding-block: clamp(1.6rem, 5vw, 3.2rem) clamp(1.8rem, 5vw, 3rem);
  background-image:
    radial-gradient(120% 90% at 88% -10%, rgba(11, 31, 51, .95), transparent 62%),
    linear-gradient(rgba(36, 70, 59, .26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 70, 59, .26) 1px, transparent 1px);
  background-size: 100% 100%, 72px 72px, 72px 72px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.3rem, 4vw, 2.2rem);
  align-items: end;
}

.page-faq .faq-hero__lead h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6.6vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -.015em;
  margin: .4rem 0 0;
  color: var(--mist);
}

.page-faq .faq-hero__lede {
  margin: 1rem 0 0;
  max-width: 60ch;
  font-size: clamp(.96rem, 2.4vw, 1.06rem);
  line-height: 1.78;
  color: var(--mist);
  opacity: .86;
}

.page-faq .faq-hero__panel {
  display: grid;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--faq-panel), var(--faq-panel-deep));
  padding: .4rem 1.1rem;
  box-shadow: 0 12px 30px -22px rgba(0, 0, 0, .8);
}

.page-faq .faq-fact {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  column-gap: .4rem;
  row-gap: .3rem;
  padding-block: .85rem;
  border-bottom: 1px solid rgba(36, 70, 59, .75);
}

.page-faq .faq-fact:last-child {
  border-bottom: 0;
}

.page-faq .faq-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4.6vw, 1.9rem);
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-fact__unit {
  font-size: .82rem;
  color: var(--lime);
  letter-spacing: .04em;
}

.page-faq .faq-fact__label {
  grid-column: 1 / -1;
  font-size: .8rem;
  line-height: 1.55;
  color: var(--muted);
  letter-spacing: .02em;
}

/* 快捷定位 */
.page-faq .faq-jump {
  list-style: none;
  margin: clamp(1.2rem, 4vw, 1.9rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-jump__item {
  display: grid;
  gap: .12rem;
  padding: .9rem .95rem;
  min-height: 100%;
  background: rgba(6, 26, 21, .96);
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background var(--dur) ease, border-color var(--dur) ease;
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  background: rgba(200, 255, 61, .08);
  border-left-color: var(--lime);
  outline: none;
}

.page-faq .faq-jump__k {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-faq .faq-jump__t {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.3;
}

.page-faq .faq-jump__d {
  font-size: .76rem;
  color: var(--muted);
  letter-spacing: .02em;
}

/* 主布局 */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  align-items: start;
  margin-top: clamp(1.8rem, 5vw, 3rem);
}

.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: rgba(11, 31, 51, .46);
  padding: .95rem 1rem;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--muted);
  margin: 0 0 .65rem;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  padding-bottom: .3rem;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: block;
  white-space: nowrap;
  padding: .42rem .7rem;
  font-size: .86rem;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  transition: color var(--dur) ease, border-color var(--dur) ease, background var(--dur) ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ink-deep);
  background: var(--lime);
  border-color: var(--lime);
  outline: none;
}

.page-faq .faq-index__note {
  margin: .85rem 0 0;
  padding-top: .75rem;
  border-top: 1px solid var(--faq-line);
  font-size: .76rem;
  line-height: 1.65;
  color: var(--muted);
}

/* 问答组 */
.page-faq .faq-group {
  scroll-margin-top: 7rem;
  padding-bottom: clamp(1.5rem, 4vw, 2.2rem);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--faq-line);
  padding-top: clamp(1.5rem, 4vw, 2.2rem);
}

.page-faq .faq-group__head h2 {
  margin: .3rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 4.2vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .faq-group__lede {
  margin: .6rem 0 0;
  max-width: 62ch;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 图 */
.page-faq .faq-figure {
  margin: 1.15rem 0 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(160deg, var(--faq-panel), var(--faq-panel-deep));
}

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

.page-faq .faq-figure figcaption {
  padding: .7rem .9rem;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .03em;
  line-height: 1.6;
  color: var(--muted);
}

/* 手风琴 */
.page-faq .faq-list {
  margin: 1.05rem 0 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .88rem .15rem;
  cursor: pointer;
  list-style: none;
  font-size: .97rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist);
  transition: color var(--dur) ease;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .faq-answer {
  padding: 0 .15rem 1rem;
}

.page-faq .faq-answer p {
  margin: 0 0 .55rem;
  font-size: .92rem;
  line-height: 1.82;
  color: var(--mist);
  opacity: .84;
}

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

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

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--gold);
  outline: none;
}

/* 三步切换 */
.page-faq .faq-steps {
  margin-top: 1.15rem;
}

.page-faq .faq-steps .tab-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: .5rem;
}

.page-faq .faq-steps .tab {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  text-align: left;
  padding: .8rem .9rem;
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  color: var(--mist);
  cursor: pointer;
  font-family: inherit;
  transition: background var(--dur) ease, border-color var(--dur) ease, color var(--dur) ease;
}

.page-faq .faq-steps .tab:hover {
  border-color: rgba(200, 255, 61, .55);
}

.page-faq .faq-steps .tab:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-steps .tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-deep);
}

.page-faq .faq-steps .tab__k {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  opacity: .78;
}

.page-faq .faq-steps .tab__t {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .01em;
  line-height: 1.3;
}

.page-faq .faq-steps .tab-panel {
  margin-top: .85rem;
  padding: .95rem 1.05rem;
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--lime);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--faq-panel), var(--faq-panel-deep));
  font-size: .93rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-steps .tab-panel p {
  margin: 0;
}

.page-faq .faq-steps .tab-panel[hidden] {
  display: none;
}

/* 行动按钮 */
.page-faq .faq-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.15rem;
}

/* 联系信息 */
.page-faq .faq-contact {
  display: grid;
  gap: 1px;
  margin-top: 1.05rem;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-contact__item {
  display: grid;
  gap: .22rem;
  padding: .85rem .95rem;
  background: rgba(11, 31, 51, .62);
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-faq .faq-contact__val {
  font-size: .93rem;
  line-height: 1.7;
  color: var(--mist);
  overflow-wrap: anywhere;
}

/* 媒体查询 */
@media (min-width: 720px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: clamp(1.6rem, 3vw, 2.8rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 5.5rem;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: .15rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    white-space: normal;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 2px;
    padding: .45rem .6rem;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    color: var(--lime);
    background: rgba(200, 255, 61, .1);
    border-left-color: var(--lime);
  }

  .page-faq .faq-steps .tab-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-item summary {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__item,
  .page-faq .faq-index__link,
  .page-faq .faq-item summary,
  .page-faq .faq-steps .tab {
    transition: none;
  }
}