.page-faq {
  --faq-edge: rgba(61, 220, 223, .26);
  --faq-surface: linear-gradient(180deg, rgba(10, 42, 68, .92), rgba(5, 22, 38, .95));
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 6vw, 76px) 0 clamp(30px, 5vw, 60px);
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -28%;
  right: -12%;
  width: min(600px, 78vw);
  height: min(600px, 78vw);
  background: radial-gradient(circle at center, rgba(61, 220, 223, .13), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 15em;
  font-size: clamp(34px, 5.6vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--white);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 33em;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.9;
  color: rgba(234, 253, 253, .78);
}

.page-faq .faq-hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: rgba(234, 253, 253, .7);
}

.page-faq .faq-hero__points li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 0 18px;
  border-right: 1px solid var(--hair);
}

.page-faq .faq-hero__points li:first-child {
  padding-left: 0;
}

.page-faq .faq-hero__points li:last-child {
  border-right: 0;
}

.page-faq .faq-hero__points .mono {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-hero__media {
  position: relative;
  border: 1px solid var(--faq-edge);
  background: linear-gradient(155deg, rgba(10, 42, 68, .95), rgba(4, 18, 31, .98));
  box-shadow: 0 30px 70px -42px rgba(0, 0, 0, .95);
  overflow: hidden;
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), transparent);
}

.page-faq .faq-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-faq .faq-hero__media .media__cap {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(234, 253, 253, .6);
  border-top: 1px solid var(--hair);
}

/* ============ 主体两栏 ============ */
.page-faq .faq-body {
  padding: clamp(42px, 6.5vw, 86px) 0;
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 44px);
  align-items: start;
}

.page-faq .faq-side__title {
  margin: 10px 0 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 900;
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-side__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(234, 253, 253, .58);
}

.page-faq .faq-side__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-faq .faq-side__filter .filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 14px;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.2;
  color: var(--cyan-soft);
  background: rgba(10, 42, 68, .58);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-faq .faq-side__filter .filter-chip:hover {
  border-color: var(--cyan);
}

.page-faq .faq-side__filter .filter-chip[aria-pressed="true"] {
  color: #04121F;
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-side__filter .filter-chip__count {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: .72;
}

/* ============ 折叠卡片 ============ */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-faq .faq-card {
  border: 1px solid var(--hair);
  background: var(--faq-surface);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-card:hover {
  transform: translateY(-4px);
  border-color: var(--faq-edge);
}

.page-faq .faq-card[data-open] {
  border-color: var(--faq-edge);
}

.page-faq .is-filtered-out {
  display: none;
}

.page-faq .faq-card__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-card__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .faq-card__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-card__main {
  display: block;
  min-width: 0;
}

.page-faq .faq-card__title {
  display: block;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-card__head:hover .faq-card__title {
  color: var(--cyan);
}

.page-faq .faq-card__meta {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(234, 253, 253, .48);
}

.page-faq .faq-card__icon {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border: 1px solid var(--hair);
  border-radius: 50%;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-card__head:hover .faq-card__icon {
  border-color: var(--cyan);
}

.page-faq .faq-card__icon::before,
.page-faq .faq-card__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-card__icon::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-card__icon::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-card[data-open] .faq-card__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-card__panel {
  padding: 0 16px 20px;
}

.page-faq .faq-card__panel[hidden] {
  display: none;
}

/* 步骤清单 */
.page-faq .faq-steps {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 12px 14px;
  counter-increment: faqstep;
  background: rgba(4, 18, 31, .6);
  border-left: 2px solid rgba(61, 220, 223, .45);
}

.page-faq .faq-step::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.95;
  color: var(--orange);
}

.page-faq .faq-step__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(234, 253, 253, .84);
}

.page-faq .faq-verdict {
  margin: 14px 0 0;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cyan-soft);
  border: 1px dashed rgba(61, 220, 223, .34);
  background: rgba(61, 220, 223, .05);
}

.page-faq .faq-inline-media {
  margin: 18px 0 0;
  max-width: 360px;
  border: 1px solid var(--hair);
  background: rgba(4, 18, 31, .5);
}

.page-faq .faq-inline-media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-faq .faq-inline-media .media__cap {
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(234, 253, 253, .58);
  border-top: 1px solid var(--hair);
}

/* ============ 替代入口 ============ */
.page-faq .faq-alt {
  padding: clamp(40px, 6vw, 78px) 0 clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(10, 42, 68, .38), transparent 72%);
}

.page-faq .faq-alt__head {
  max-width: 44em;
}

.page-faq .faq-alt__title {
  margin: 10px 0 0;
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.18;
  color: var(--white);
}

.page-faq .faq-alt__note {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 253, 253, .72);
}

.page-faq .faq-alt__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-alt__card {
  position: relative;
  display: block;
  padding: 18px 46px 20px 18px;
  border: 1px solid var(--hair);
  background: rgba(10, 42, 68, .55);
  color: var(--white);
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-alt__card:hover {
  transform: translateY(-4px);
  border-color: var(--faq-edge);
  background: rgba(10, 42, 68, .86);
}

.page-faq .faq-alt__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-faq .faq-alt__name {
  display: block;
  margin-top: 10px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .faq-alt__desc {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(234, 253, 253, .68);
}

.page-faq .faq-alt__go {
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--cyan);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-alt__card:hover .faq-alt__go {
  transform: translateX(4px);
  color: var(--orange);
}

.page-faq .faq-alt__assist {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3vw, 34px);
  padding: 20px;
  border: 1px solid var(--faq-edge);
  background:
    radial-gradient(90% 140% at 0% 0%, rgba(61, 220, 223, .12), transparent 62%),
    rgba(10, 42, 68, .7);
}

.page-faq .faq-alt__assist-text {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 253, 253, .78);
}

.page-faq .faq-alt__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-alt__mail {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--cyan-soft);
  word-break: break-all;
}

.page-faq .faq-alt__rule {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(234, 253, 253, .55);
}

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

.page-faq .faq-alt__rule a:hover {
  color: var(--orange);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-faq .faq-card__head {
    padding: 20px 22px;
    gap: 20px;
  }

  .page-faq .faq-card__panel {
    padding: 0 22px 26px;
  }

  .page-faq .faq-step {
    grid-template-columns: 36px minmax(0, 1fr);
    padding: 14px 16px;
  }
}

@media (min-width: 700px) {
  .page-faq .faq-alt__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-alt__assist {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    padding: 24px 26px;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-faq .faq-side {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-side__filter {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-side__filter .filter-chip {
    width: 100%;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-alt__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-inline-media {
    max-width: 420px;
  }
}