.page-faq {
  background: var(--c-void);
  color: var(--c-paper);
  overflow-x: clip;
}

.page-faq [id^="faq-"] {
  scroll-margin-top: 120px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(20px, 3vw, 34px);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

.page-faq .breadcrumbs a {
  color: var(--c-turf);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--c-cyan);
  text-decoration: underline;
}

.page-faq .breadcrumbs span[aria-hidden] {
  margin: 0 .5em;
  color: var(--c-line);
}

/* ---------- 首屏 ---------- */
.faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 5vw, 62px) clamp(70px, 9vw, 120px);
  background:
    radial-gradient(110% 80% at 86% 0%, rgba(22, 224, 207, .13), transparent 55%),
    radial-gradient(92% 72% at 4% 100%, rgba(15, 138, 77, .30), transparent 62%),
    var(--c-void);
}

.faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 100%;
  background: linear-gradient(200deg, rgba(122, 92, 255, .12), transparent 62%);
  pointer-events: none;
}

.faq-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -2px;
  height: clamp(32px, 5vw, 62px);
  background: var(--c-night);
  transform: skewY(-2.2deg);
  transform-origin: 0 100%;
  pointer-events: none;
}

.faq-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: end;
}

.faq-hero__copy .display {
  margin: 14px 0 0;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.faq-hero__lead {
  margin-top: clamp(16px, 2vw, 22px);
  max-width: 36em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--c-soft);
}

.faq-hero__panel {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 2.6vw, 30px);
  background: linear-gradient(155deg, rgba(15, 138, 77, .34), rgba(16, 24, 32, .92) 55%, rgba(7, 12, 16, .96));
  box-shadow: inset 0 0 0 1px var(--c-line);
}

.faq-hero__panel .annotation {
  color: var(--c-turf);
  letter-spacing: .2em;
}

.faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: clamp(14px, 2.4vw, 22px);
}

.faq-stat__k {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.01em;
}

.faq-stat__u {
  margin-left: .1em;
  font-size: .48em;
  color: var(--c-turf);
}

.faq-stat__l {
  display: block;
  margin-top: 9px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-muted);
}

/* ---------- 四宫格索引 ---------- */
.faq-index {
  position: relative;
  background: var(--c-night);
  border-top: 1px solid var(--c-line);
  padding-bottom: clamp(48px, 7vw, 84px);
}

.faq-index .section__title {
  color: var(--c-paper);
}

.faq-index .section__note {
  color: var(--c-muted);
}

.faq-index__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(10px, 1.6vw, 16px);
  margin-top: clamp(22px, 3.4vw, 38px);
}

.faq-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 186px;
  padding: clamp(20px, 2.4vw, 26px);
  color: var(--c-paper);
  text-decoration: none;
  background: linear-gradient(158deg, rgba(34, 48, 58, .9), rgba(16, 24, 32, .96));
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.faq-tile::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 46%;
  height: 3px;
  background: var(--c-turf);
  transition: background var(--dur) var(--ease), right var(--dur) var(--ease);
}

.faq-tile:hover,
.faq-tile:focus-visible {
  background: linear-gradient(158deg, rgba(15, 138, 77, .55), rgba(16, 24, 32, .96));
  transform: translateY(-2px);
}

.faq-tile:hover::after,
.faq-tile:focus-visible::after {
  right: 0;
  background: var(--c-cyan);
}

.faq-tile:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.faq-tile__num {
  position: absolute;
  top: clamp(16px, 2vw, 22px);
  right: clamp(16px, 2vw, 22px);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--c-cyan);
}

.faq-tile__title {
  display: block;
  margin-top: 12px;
  font-size: clamp(17px, 1.9vw, 19px);
  font-weight: 700;
  letter-spacing: .02em;
}

.faq-tile__desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.faq-tile__go {
  margin-top: auto;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--c-turf);
}

/* ---------- 问答组通用 ---------- */
.faq-group {
  position: relative;
  padding-block: clamp(52px, 7vw, 90px);
  border-top: 1px solid var(--c-line);
  background: var(--c-void);
}

.faq-group--night {
  background: linear-gradient(180deg, var(--c-night), var(--c-void) 78%);
}

.faq-group .section__title {
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.3;
  color: var(--c-paper);
}

.faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 28px);
  align-items: start;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.faq-group__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 50px);
  line-height: .95;
  letter-spacing: .02em;
  color: var(--c-pitch);
}

.faq-group__note {
  margin: 10px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.faq-group__body {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  align-items: start;
}

.faq-group__media {
  margin: 0;
}

.faq-group__media--portrait {
  aspect-ratio: 3 / 4;
}

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

.page-faq .faq-group__media--portrait img {
  height: 100%;
}

.page-faq .faq-group__media .media-frame__caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-accordion {
  border-top: 1px solid var(--c-line);
}

.page-faq .accordion__item {
  position: relative;
  border-bottom: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease);
}

.page-faq .accordion__item:has([aria-expanded="true"]) {
  background: linear-gradient(90deg, rgba(22, 224, 207, .10), transparent 62%);
}

.page-faq .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(10px, 1.6vw, 16px);
  align-items: start;
  width: 100%;
  padding: clamp(16px, 2.2vw, 22px) clamp(10px, 1.5vw, 18px);
  border: 0;
  background: none;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--c-cyan);
}

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

.page-faq .faq-q__num {
  min-width: 2.6em;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--c-muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .accordion__item:has([aria-expanded="true"]) .faq-q__num {
  color: var(--c-cyan);
}

.page-faq .faq-q__text {
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 600;
  line-height: 1.6;
}

.page-faq .accordion__sign {
  position: relative;
  align-self: start;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  flex: none;
}

.page-faq .accordion__sign::before,
.page-faq .accordion__sign::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 15px;
  height: 2px;
  background: var(--c-turf);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .accordion__sign::after {
  transform: rotate(90deg);
}

.page-faq .accordion__item:has([aria-expanded="true"]) .accordion__sign::before {
  background: var(--c-cyan);
}

.page-faq .accordion__item:has([aria-expanded="true"]) .accordion__sign::after {
  transform: rotate(0deg);
  background: var(--c-cyan);
}

.page-faq .accordion__panel-inner {
  padding: 0 clamp(12px, 2vw, 20px) clamp(18px, 2.6vw, 26px);
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-soft);
}

.page-faq .accordion__panel-inner p {
  margin: 0;
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: faq-step;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faq-step;
  padding-left: 44px;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  display: grid;
  place-items: center;
  width: 28px;
  height: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--c-void);
  background: var(--c-turf);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: 33px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-top: 1.5px solid var(--c-cyan);
  border-right: 1.5px solid var(--c-cyan);
  transform: rotate(45deg);
}

/* ---------- 联系组 ---------- */
.faq-group--contact {
  background:
    radial-gradient(90% 70% at 0% 0%, rgba(15, 138, 77, .22), transparent 60%),
    var(--c-night);
  border-top: 1px solid var(--c-line);
}

.faq-contact {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.faq-contact__card {
  padding: clamp(22px, 2.8vw, 32px);
  background: linear-gradient(160deg, rgba(15, 138, 77, .30), rgba(7, 12, 16, .95) 62%);
  box-shadow: inset 0 0 0 1px var(--c-line);
}

.faq-contact__card .annotation {
  display: block;
  margin-bottom: 18px;
  color: var(--c-turf);
  letter-spacing: .2em;
}

.faq-contact__list {
  display: grid;
  gap: 18px;
  margin: 0;
}

.faq-contact__list dt {
  margin-bottom: 7px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-muted);
}

.faq-contact__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 16.5px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-paper);
  word-break: break-all;
}

.faq-contact__prep h3 {
  margin: 0 0 16px;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.4;
  color: var(--c-paper);
}

.faq-contact__prep ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.faq-contact__prep li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-soft);
}

.faq-contact__prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 11px;
  height: 2px;
  background: var(--c-turf);
}

.faq-contact__next {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid var(--c-line);
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-muted);
}

.page-faq .faq-contact__next .link-arrow {
  color: var(--c-cyan);
  text-decoration: none;
  white-space: nowrap;
}

.page-faq .faq-contact__next .link-arrow:hover,
.page-faq .faq-contact__next .link-arrow:focus-visible {
  color: var(--c-volt);
  text-decoration: underline;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .faq-group__body--media-left {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .faq-group__body--media-right {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .faq-contact {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-faq .accordion__panel-inner {
    padding-left: calc(clamp(10px, 1.5vw, 18px) + 3.6em);
  }
}

@media (max-width: 999px) {
  .faq-group__body--media-right .faq-group__media--portrait {
    max-width: 420px;
    aspect-ratio: 3 / 4;
  }
}

@media (max-width: 520px) {
  .faq-tile {
    min-height: 150px;
  }

  .faq-group__num {
    font-size: 28px;
  }

  .page-faq .faq-steps li {
    padding-left: 38px;
  }

  .page-faq .faq-steps li::after {
    left: 29px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq-tile,
  .page-faq .accordion__item,
  .page-faq .accordion__sign::before,
  .page-faq .accordion__sign::after {
    transition: none;
  }

  .faq-tile:hover,
  .faq-tile:focus-visible {
    transform: none;
  }
}