.page-faq {
  --faq-rail: 236px;
  --faq-gap: clamp(1.5rem, 4vw, 4rem);
  --faq-rule: rgba(30, 74, 107, 0.55);
  --faq-rule-strong: rgba(34, 224, 214, 0.34);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(2.5rem, 7vw, 5.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(31, 107, 74, 0.32), transparent 62%),
    linear-gradient(180deg, rgba(13, 36, 56, 0.9) 0%, rgba(7, 26, 43, 0.2) 100%);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--hairline);
  padding: clamp(1.5rem, 4vw, 3rem);
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--fluoro-cyan);
  opacity: 0.7;
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__text h1 {
  margin: 0.8rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--off-white);
  max-width: 20ch;
}

.page-faq .faq-hero__text .lede {
  margin-top: 1.1rem;
  max-width: 56ch;
  color: var(--ink-soft);
  font-size: var(--fs-16);
  line-height: 1.8;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2.25rem;
  margin-top: 1.85rem;
  padding-top: 1.35rem;
  border-top: 1px dashed var(--hairline-soft);
}

.page-faq .faq-hero__facts .stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 8rem;
}

.page-faq .faq-hero__facts .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1;
  color: var(--fluoro-cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__unit {
  font-size: var(--fs-14);
  margin-left: 0.25rem;
  color: var(--mineral-gray);
}

.page-faq .faq-hero__facts .stat__label {
  font-size: var(--fs-12);
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--hairline);
  background: var(--panel-navy);
}

.page-faq .faq-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-hero__figure .figure__cap {
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--hairline-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--mineral-gray);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__frame {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }
  .page-faq .faq-index {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }
}

/* ---------- 左侧索引 ---------- */

.page-faq .faq-index {
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-index__head {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
}

.page-faq .faq-index__item {
  flex: 0 1 auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.3rem 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: var(--fs-14);
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

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

.page-faq .faq-index__num {
  font-size: var(--fs-12);
  color: var(--mineral-gray);
}

.page-faq .faq-index__note {
  margin: 1.35rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-faq .faq-index__note a {
  color: var(--signal-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 44, 0.45);
}

.page-faq .faq-index__note a:hover,
.page-faq .faq-index__note a:focus-visible {
  color: var(--off-white);
  border-bottom-color: var(--off-white);
}

@media (min-width: 980px) {
  .page-faq .faq-index {
    padding-top: 1.5rem;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
  }
  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--hairline-soft);
    font-size: var(--fs-14);
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-bottom-color: var(--fluoro-cyan);
    padding-left: 0.4rem;
  }
}

/* ---------- 问答区块 ---------- */

.page-faq .faq-block {
  margin: 0 0 clamp(2.5rem, 6vw, 4rem);
  scroll-margin-top: 6.5rem;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx title"
    "idx desc";
  column-gap: 1rem;
  align-items: baseline;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-block__idx {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  color: var(--signal-orange);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-block__title {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  letter-spacing: 0.01em;
  color: var(--off-white);
}

.page-faq .faq-block__desc {
  grid-area: desc;
  margin: 0.35rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink-mute);
  max-width: 60ch;
}

/* 折叠问答 */

.page-faq .qa {
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 1.1rem 2.25rem 1.1rem 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.6;
  color: var(--off-white);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--fluoro-cyan);
  outline: none;
}

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 1.05rem;
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  line-height: 1;
  color: var(--mineral-gray);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .qa[open] .qa__q {
  color: var(--fluoro-cyan);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
  color: var(--signal-orange);
}

.page-faq .qa__a {
  padding: 0 0 1.3rem;
  max-width: 72ch;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .qa__a a {
  color: var(--fluoro-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, 0.4);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--off-white);
  border-bottom-color: var(--off-white);
}

/* ---------- 联系客服 ---------- */

.page-faq .faq-block--contact {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--hairline);
  background:
    linear-gradient(160deg, rgba(31, 107, 74, 0.22), rgba(13, 36, 56, 0.85) 58%),
    var(--panel-navy);
}

.page-faq .faq-contact {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.25rem;
}

@media (min-width: 860px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-contact__list .data-list__row {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.75rem;
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--hairline-soft);
}

.page-faq .faq-contact__list .data-list__key {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--mineral-gray);
}

.page-faq .faq-contact__list .data-list__val {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--off-white);
  word-break: break-word;
}

.page-faq .faq-contact__list .data-list__val a {
  color: var(--fluoro-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, 0.4);
}

.page-faq .faq-contact__list .data-list__val a:hover,
.page-faq .faq-contact__list .data-list__val a:focus-visible {
  color: var(--off-white);
  border-bottom-color: var(--off-white);
}

.page-faq .faq-contact__tip {
  margin: 1.15rem 0 1.4rem;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 54ch;
}

.page-faq .faq-contact__figure {
  margin: 0;
  border: 1px solid var(--hairline);
  background: var(--deep-space-blue);
}

.page-faq .faq-contact__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-contact__figure .figure__cap {
  padding: 0.6rem 0.85rem;
  border-top: 1px solid var(--hairline-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.05em;
  color: var(--mineral-gray);
}

/* ---------- 延伸阅读 ---------- */

.page-faq .faq-more {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-more__title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
  font-weight: 500;
}

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

@media (min-width: 720px) {
  .page-faq .faq-more__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 2rem;
  }
}

.page-faq .faq-more__link {
  display: block;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--hairline-soft);
  text-decoration: none;
  transition: border-color 0.22s var(--ease);
}

.page-faq .faq-more__link:hover,
.page-faq .faq-more__link:focus-visible {
  border-bottom-color: var(--signal-orange);
  outline: none;
}

.page-faq .faq-more__label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 600;
  color: var(--off-white);
  transition: color 0.22s var(--ease);
}

.page-faq .faq-more__link:hover .faq-more__label,
.page-faq .faq-more__link:focus-visible .faq-more__label {
  color: var(--signal-orange);
}

.page-faq .faq-more__desc {
  display: block;
  margin-top: 0.3rem;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink-mute);
}