/* ===== 支持中心 / support ===== */
.page-faq {
  --faq-line: rgba(242, 245, 239, 0.13);
  --faq-line-hi: rgba(242, 245, 239, 0.28);
  --faq-soft: rgba(242, 245, 239, 0.76);
  --faq-sub: rgba(242, 245, 239, 0.62);
  background: var(--char);
  color: var(--white);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

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

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 3.5vw, 36px) 0 clamp(34px, 5vw, 68px);
  background: linear-gradient(172deg, var(--green-deep) 0%, #0d2419 46%, var(--char) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(242, 245, 239, 0.045) 0 1px,
    transparent 1px 76px
  );
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: 68%;
  height: 96%;
  background: radial-gradient(circle, rgba(200, 255, 61, 0.15), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2.9rem, 11vw, 6.6rem);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--white);
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: clamp(74px, 14vw, 158px);
  height: 8px;
  margin-top: clamp(14px, 2vw, 22px);
  background: var(--lime);
  transform: skewX(-12deg);
}

.page-faq .faq-hero__lead {
  max-width: 64ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  background: rgba(14, 15, 13, 0.74);
}

.page-faq .faq-hero__fact-value {
  font-family: var(--font-cond);
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__fact-value em {
  font-style: normal;
  margin-left: 5px;
  font-size: 0.42em;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-faq .faq-hero__fact-label {
  font-size: 0.79rem;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--gray);
}

.page-faq .faq-hero__banner {
  margin: clamp(30px, 5vw, 54px) 0 0;
  border: 1px solid var(--faq-line);
  aspect-ratio: 16 / 7;
  overflow: hidden;
  background: var(--graphite);
}

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

@media (max-width: 719px) {
  .page-faq .faq-hero__banner {
    aspect-ratio: 16 / 11;
  }
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: clamp(42px, 7vw, 92px) 0 clamp(56px, 8vw, 110px);
  background: var(--char);
}

.page-faq .faq-body__head {
  max-width: 68ch;
  margin-bottom: clamp(26px, 4vw, 50px);
}

.page-faq .faq-shell {
  display: block;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-faq .faq-index__btn {
  display: flex;
  align-items: baseline;
  gap: 9px;
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  background: rgba(242, 245, 239, 0.035);
  border: 1px solid var(--faq-line);
  color: var(--gray);
  font-family: inherit;
  font-size: 0.9rem;
  line-height: 1.4;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
  transition: color 180ms var(--ease), background 180ms var(--ease),
    border-color 180ms var(--ease);
}

.page-faq .faq-index__btn:hover {
  color: var(--white);
  border-color: var(--faq-line-hi);
}

.page-faq .faq-index__btn[aria-selected="true"] {
  color: var(--char);
  background: var(--lime);
  border-color: var(--lime);
}

.page-faq .faq-index__num {
  flex: none;
  font-family: var(--font-cond);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.page-faq .faq-index__label {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.page-faq .faq-index__cn {
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.35;
}

.page-faq .faq-index__en {
  font-family: var(--font-cond);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.55;
}

@media (max-width: 899px) {
  .page-faq .faq-index__en {
    display: none;
  }
}

/* ---------- 右侧答案 ---------- */
.page-faq .faq-answers {
  min-width: 0;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .faq-panel {
  position: relative;
  padding: clamp(18px, 3vw, 30px);
  background-color: var(--graphite);
  background-image: linear-gradient(rgba(242, 245, 239, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 245, 239, 0.035) 1px, transparent 1px);
  background-size: 44px 44px, 44px 44px;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-panel + .faq-panel {
  margin-top: 20px;
}

.page-faq .faq-panel__figure {
  max-width: 560px;
  margin: 0 0 clamp(18px, 3vw, 26px);
  border: 1px solid var(--faq-line);
  background: var(--char);
}

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

.page-faq .faq-panel__figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--gray);
}

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

.page-faq .faq-q:first-of-type {
  border-top: 0;
}

.page-faq .faq-q__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 44px;
  padding: 17px 4px;
  list-style: none;
  cursor: pointer;
  color: var(--white);
  font-size: clamp(0.98rem, 1.3vw, 1.06rem);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: 0.01em;
  transition: color 160ms var(--ease);
}

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

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

.page-faq .faq-q__summary:hover,
.page-faq .faq-q[open] > .faq-q__summary {
  color: var(--lime);
}

.page-faq .faq-q__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-faq .faq-q__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .faq-q[open] .faq-q__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-q__body {
  max-width: 74ch;
  padding: 0 4px 22px 34px;
  color: var(--faq-soft);
  font-size: 0.96rem;
  line-height: 1.88;
}

.page-faq .faq-q__body p {
  margin: 0 0 10px;
}

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

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

/* ---------- 联系面板 ---------- */
.page-faq .faq-panel--contact {
  background-color: var(--green-deep);
  background-image: linear-gradient(rgba(200, 255, 61, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 255, 61, 0.055) 1px, transparent 1px);
  background-size: 44px 44px, 44px 44px;
  border-color: rgba(200, 255, 61, 0.28);
}

.page-faq .faq-panel__title {
  margin: 12px 0 0;
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--white);
}

.page-faq .faq-panel__text {
  max-width: 68ch;
  margin: 14px 0 0;
  font-size: 0.96rem;
  line-height: 1.88;
  color: var(--faq-soft);
}

.page-faq .faq-panel__text strong {
  color: var(--lime);
  font-weight: 700;
}

.page-faq .faq-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: minmax(200px, 262px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-index__list {
    display: block;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-index__item {
    display: block;
  }

  .page-faq .faq-index__btn {
    align-items: flex-start;
    padding: 14px 16px 14px 18px;
    background: transparent;
    border: 0;
    border-left: 2px solid var(--faq-line);
    white-space: normal;
  }

  .page-faq .faq-index__btn:hover {
    color: var(--white);
    background: rgba(242, 245, 239, 0.035);
  }

  .page-faq .faq-index__btn[aria-selected="true"] {
    color: var(--white);
    background: linear-gradient(90deg, rgba(200, 255, 61, 0.12), transparent 82%);
    border-color: var(--faq-line);
    border-left-color: var(--lime);
  }

  .page-faq .faq-index__btn[aria-selected="true"] .faq-index__num {
    color: var(--lime);
    opacity: 1;
  }

  .page-faq .faq-index__num {
    font-size: 0.86rem;
    padding-top: 3px;
  }

  .page-faq .faq-answers {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after,
  .page-faq .faq-index__btn,
  .page-faq .faq-q__summary {
    transition: none;
  }
}
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