.page-faq {
  --faq-cut: clamp(12px, 1.6vw, 20px);
  --faq-edge: rgba(217, 255, 242, 0.14);
  --faq-edge-strong: rgba(47, 240, 200, 0.42);
  --faq-soft: rgba(4, 18, 14, 0.78);
  color: var(--ink);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding-top: clamp(6.5rem, 16vw, 9.5rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 62% at 12% 18%, rgba(47, 240, 200, 0.16), transparent 68%),
    radial-gradient(46% 54% at 92% 6%, rgba(255, 106, 43, 0.13), transparent 70%),
    linear-gradient(180deg, rgba(6, 23, 38, 0.72), rgba(4, 18, 14, 0) 78%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
  min-width: 0;
}

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

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(1.1rem, 3vw, 1.9rem);
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 0.6rem 0 0;
  max-width: 20ch;
  letter-spacing: -0.015em;
}

.page-faq .faq-hero .lede {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 42ch;
  color: var(--mist);
}

.page-faq .faq-hero__frame {
  margin: 0;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--faq-edge);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(6, 23, 38, 0.95), rgba(11, 52, 40, 0.75));
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%
  );
}

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

.page-faq .faq-hero__frame .media-frame__cap {
  padding: 0.6rem clamp(0.9rem, 2vw, 1.2rem) 0;
}

/* ============ 筛选区 ============ */
.page-faq .faq-panel {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-filter__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--faq-edge);
}

.page-faq .faq-filter__bar .title-md {
  margin: 0;
}

.page-faq .faq-filter__bar .filter-hint {
  margin: 0;
  color: var(--mist);
  font-size: 0.88rem;
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: clamp(1rem, 2.5vw, 1.5rem);
}

.page-faq .filter-chip {
  appearance: none;
  font: inherit;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--faq-edge);
  background: rgba(11, 52, 40, 0.5);
  color: var(--mist);
  cursor: pointer;
  white-space: nowrap;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-faq .filter-chip:hover {
  color: var(--ink);
  border-color: var(--faq-edge-strong);
  transform: translateY(-1px);
}

.page-faq .filter-chip[aria-pressed="true"] {
  color: var(--night);
  background: var(--cyan);
  border-color: var(--cyan);
  transform: none;
}

/* ============ 问答列表 ============ */
.page-faq .faq-list {
  display: grid;
  gap: 0.7rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  min-width: 0;
}

.page-faq .faq-item {
  position: relative;
  min-width: 0;
  border: 1px solid var(--faq-edge);
  background: linear-gradient(160deg, rgba(11, 52, 40, 0.55), rgba(4, 18, 14, 0.82));
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%
  );
  transition:
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(47, 240, 200, 0.28);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-edge-strong);
  background: linear-gradient(160deg, rgba(11, 52, 40, 0.9), rgba(4, 18, 14, 0.94));
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "no tag sign"
    "text text text";
  align-items: center;
  gap: 0.55rem 0.7rem;
  padding: clamp(0.95rem, 2.2vw, 1.2rem) clamp(1rem, 2.4vw, 1.5rem);
  cursor: pointer;
  list-style: none;
  min-width: 0;
}

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

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

.page-faq .faq-item__no {
  grid-area: no;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-item__tag {
  grid-area: tag;
  justify-self: start;
  font-size: 0.72rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  padding: 0 0.55rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .faq-tag--data {
  color: var(--cyan);
}

.page-faq .faq-tag--stat {
  color: var(--orange);
}

.page-faq .faq-tag--acct {
  color: var(--amber);
}

.page-faq .faq-tag--coop {
  color: var(--mist);
}

.page-faq .faq-item__text {
  grid-area: text;
  min-width: 0;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .faq-item__sign {
  grid-area: sign;
  justify-self: end;
  position: relative;
  width: 1.05rem;
  height: 1.05rem;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--mist);
  transform: translateY(-50%);
  transition:
    transform var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-item__sign::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--cyan);
}

.page-faq .faq-item__a {
  margin: 0 clamp(1rem, 2.4vw, 1.5rem) clamp(1rem, 2.2vw, 1.35rem);
  padding: clamp(0.85rem, 2vw, 1.15rem) clamp(0.95rem, 2vw, 1.3rem);
  background: var(--faq-soft);
  border-left: 2px solid rgba(47, 240, 200, 0.4);
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.78;
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 12px),
    calc(100% - 12px) 100%,
    0 100%
  );
  animation: page-faq-open var(--dur-slow) var(--ease) both;
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-item__a p + p {
  margin-top: 0.7rem;
}

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

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.95em;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

@keyframes page-faq-open {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ============ 刻度分隔 ============ */
.page-faq .faq-break {
  display: grid;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--faq-edge);
}

.page-faq .faq-break__media {
  margin: 0;
  aspect-ratio: 10 / 7;
  overflow: hidden;
  background: linear-gradient(150deg, rgba(6, 23, 38, 0.95), rgba(11, 52, 40, 0.7));
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%
  );
}

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

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

.page-faq .faq-break__side .eyebrow {
  margin: 0 0 0.6rem;
}

.page-faq .faq-scale {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.page-faq .faq-scale__tick {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  letter-spacing: 0.01em;
  color: var(--amber);
  white-space: nowrap;
}

.page-faq .faq-scale__line {
  flex: 1 1 2rem;
  min-width: 1.25rem;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    rgba(217, 255, 242, 0.45) 0 1px,
    transparent 1px 7px
  );
}

.page-faq .faq-break__note {
  margin: 0.85rem 0 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--mist);
  max-width: 42ch;
}

/* ============ 联系区块 ============ */
.page-faq .faq-help__panel {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  min-width: 0;
}

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

.page-faq .faq-help__copy .eyebrow {
  margin: 0;
}

.page-faq .faq-help__copy h2 {
  margin: 0.55rem 0 0;
}

.page-faq .faq-help__lede {
  margin: 0.9rem 0 1.5rem;
  max-width: 44ch;
  color: var(--mist);
  line-height: 1.78;
}

.page-faq .faq-help__contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  min-width: 0;
}

.page-faq .faq-help__contact li {
  display: grid;
  gap: 0.15rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--faq-edge);
  min-width: 0;
}

.page-faq .faq-help__contact li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-help__k {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-help__v {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}

/* ============ 断点 ============ */
@media (min-width: 720px) {
  .page-faq .faq-item__q {
    grid-template-columns: 4.25rem auto 1fr auto;
    grid-template-areas: "no tag text sign";
    align-items: center;
    gap: 0.7rem 1rem;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .faq-help__contact {
    padding-top: 0.4rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    align-items: end;
  }

  .page-faq .faq-hero::after {
    content: "";
    position: absolute;
    z-index: -1;
    left: 52%;
    top: 14%;
    width: 1px;
    height: 74%;
    pointer-events: none;
    background: linear-gradient(180deg, transparent, rgba(47, 240, 200, 0.34), transparent);
    transform: rotate(13deg);
    transform-origin: top center;
  }

  .page-faq .faq-break {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .filter-chip,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }

  .page-faq .faq-item__a {
    animation: none;
  }
}