.page-faq {
  --faq-top: 112px;
  display: block;
  background: var(--c-mist);
  color: var(--c-ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--c-lake);
  color: var(--c-fog);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(30, 90, 102, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 90, 102, .5) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(125% 95% at 80% 8%, #000 0%, transparent 70%);
  mask-image: radial-gradient(125% 95% at 80% 8%, #000 0%, transparent 70%);
  opacity: .65;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -12%;
  bottom: -34%;
  width: 62%;
  height: 96%;
  background: linear-gradient(158deg, rgba(27, 79, 216, .46), rgba(57, 230, 122, .1) 72%);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero .crumbs {
  padding-top: clamp(22px, 4vw, 40px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
  padding: clamp(26px, 4.4vw, 52px) 0 clamp(46px, 7vw, 104px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 16ch;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(34px, 5.8vw, 68px);
  line-height: 1.04;
  letter-spacing: -.022em;
  color: #fff;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--fog-86);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-stat {
  flex: 1 1 150px;
  min-width: 0;
  padding: 12px 16px;
  border: 1px solid rgba(30, 90, 102, .9);
  background: rgba(11, 60, 73, .74);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--c-amber);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--fog-64);
}

.page-faq .faq-hero__media {
  margin: 0;
  overflow: hidden;
  clip-path: polygon(0 9%, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(.86) contrast(1.05);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  background: var(--c-mist);
  padding: clamp(38px, 6vw, 86px) 0 clamp(54px, 8vw, 118px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 54px);
  align-items: start;
}

.page-faq .faq-rail {
  border: 1px solid var(--ink-08);
  background: rgba(255, 255, 255, .74);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 18px 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: var(--fs-eyebrow);
  letter-spacing: .1em;
  color: var(--ink-62);
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-78);
  text-decoration: none;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.page-faq .faq-rail__link:hover {
  background: var(--ink-08);
  border-left-color: var(--c-cobalt);
  color: var(--c-ink);
}

.page-faq .faq-rail__link[aria-current] {
  background: rgba(57, 230, 122, .13);
  border-left-color: var(--c-turf);
  color: var(--c-ink);
  font-weight: 600;
}

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

.page-faq .faq-rail__num {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-cobalt);
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ink-16);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-48);
}

/* ---------- 分组 ---------- */
.page-faq .faq-stack {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: var(--faq-top);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--c-lake);
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: .14em;
  color: var(--c-cobalt);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(24px, 3.1vw, 34px);
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--c-ink);
}

.page-faq .faq-group__sub {
  flex: 1 1 100%;
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-62);
}

.page-faq .faq-figure {
  margin: 0 0 18px;
  display: grid;
  gap: 10px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--ink-08);
  background: var(--c-night);
}

.page-faq .faq-figure figcaption {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-48);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  background: var(--c-paper);
  border: 1px solid var(--ink-08);
  scroll-margin-top: var(--faq-top);
  transition: border-color .2s ease, box-shadow .28s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(27, 79, 216, .44);
  box-shadow: 0 22px 40px -32px rgba(6, 42, 51, .72);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.4vw, 26px);
  cursor: pointer;
  list-style: none;
  transition: background-color .2s ease;
}

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

.page-faq .faq-item__q:hover {
  background: rgba(27, 79, 216, .05);
}

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

.page-faq .faq-item__q::after {
  content: "";
  flex: none;
  margin-left: auto;
  align-self: center;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--c-cobalt);
  border-bottom: 2px solid var(--c-cobalt);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform .24s ease, border-color .24s ease;
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg) translate(-2px, -2px);
  border-color: var(--c-turf);
}

.page-faq .faq-item__num {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-cobalt);
}

.page-faq .faq-item__text {
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-ink);
}

.page-faq .faq-item__panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 26px);
  padding: 18px clamp(16px, 2.4vw, 26px) clamp(20px, 2.4vw, 28px);
  border-top: 1px solid var(--ink-08);
}

.page-faq .faq-item__panel::before {
  content: "";
  position: absolute;
  left: clamp(16px, 2.4vw, 26px);
  right: clamp(16px, 2.4vw, 26px);
  top: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-turf), rgba(57, 230, 122, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .36s ease;
}

.page-faq .faq-item[open] .faq-item__panel::before {
  transform: scaleX(1);
}

.page-faq .faq-answer {
  max-width: 42ch;
  min-width: 0;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--ink-78);
}

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

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

.page-faq .faq-fig {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--c-lake);
}

.page-faq .faq-timer {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin-top: 14px;
}

.page-faq .faq-note {
  margin: 0;
  align-self: start;
  max-width: 34ch;
  padding: 3px 0 3px 12px;
  border-left: 2px solid var(--c-turf);
  background: linear-gradient(90deg, rgba(57, 230, 122, .1), rgba(57, 230, 122, 0) 92%);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-62);
}

.page-faq .faq-link {
  color: var(--c-cobalt);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 79, 216, .34);
  transition: border-color .2s ease, color .2s ease;
}

.page-faq .faq-link:hover {
  border-bottom-color: currentColor;
}

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

/* ---------- 检索说法 ---------- */
.page-faq .faq-lookup {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink-16);
}

.page-faq .faq-lookup__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--ink-16);
}

.page-faq .faq-lookup__phrase {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-62);
}

.page-faq .faq-lookup__phrase::before {
  content: "“";
}

.page-faq .faq-lookup__phrase::after {
  content: "”";
}

.page-faq .faq-lookup__link {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-cobalt);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 79, 216, .3);
  justify-self: start;
}

.page-faq .faq-lookup__link:hover {
  border-bottom-color: currentColor;
}

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

/* ---------- 收尾引导 ---------- */
.page-faq .faq-cta {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--c-lake);
  color: var(--c-fog);
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -8%;
  top: -46%;
  width: 58%;
  height: 150%;
  background: linear-gradient(200deg, rgba(27, 79, 216, .5), rgba(6, 42, 51, 0) 70%);
  clip-path: polygon(0 0, 82% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-cta__inner {
  padding: clamp(46px, 7vw, 96px) 0 clamp(52px, 8vw, 104px);
  max-width: 56ch;
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: #fff;
}

.page-faq .faq-cta__body {
  margin: 18px 0 0;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--fog-86);
}

.page-faq .faq-cta__mail {
  display: inline-block;
  margin: 22px 0 0;
  padding: 12px 18px;
  border: 1px solid rgba(30, 90, 102, .95);
  background: rgba(11, 60, 73, .8);
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 19px);
  letter-spacing: .01em;
  color: var(--c-turf);
  word-break: break-all;
}

.page-faq .faq-cta__hint {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog-64);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-lookup__item {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 20px;
    align-items: baseline;
  }
}

@media (min-width: 780px) {
  .page-faq .faq-figure {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: center;
    gap: 20px;
  }

  .page-faq .faq-figure img {
    aspect-ratio: 4 / 3;
    object-fit: cover;
  }

  .page-faq .faq-figure figcaption {
    font-size: 14px;
  }

  .page-faq .faq-item__panel {
    grid-template-columns: minmax(0, 42ch) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 252px minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-top);
  }
}