/* ===== 答疑中心 · 页面专属样式 ===== */
.page-faq {
  position: relative;
  background:
    radial-gradient(110% 70% at 88% -6%, rgba(47, 227, 208, .12), transparent 58%),
    radial-gradient(85% 60% at -10% 16%, rgba(255, 122, 89, .09), transparent 62%);
}

.page-faq .faq-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .crumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(26px, 4.5vw, 52px) clamp(38px, 6vw, 72px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 46px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lead {
  margin-top: 18px;
  max-width: 58ch;
  color: var(--mist);
}

.page-faq .faq-hero__note {
  margin-top: 18px;
  padding-left: 16px;
  border-left: 3px solid var(--coral);
  border-radius: 2px;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid rgba(47, 227, 208, .28);
  box-shadow: var(--shadow-soft);
}

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

.page-faq .faq-hero__media .media__caption {
  padding: 10px 18px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

.page-faq .faq-index {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  padding-left: 4px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-index__nav {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border-radius: var(--pill);
  border: 1px solid transparent;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-index__link:hover {
  color: var(--paper);
  background: rgba(47, 227, 208, .08);
  border-color: rgba(47, 227, 208, .32);
}

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

@media (min-width: 1000px) {
  .page-faq .faq-index__nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    overflow: visible;
  }
  .page-faq .faq-index__link {
    white-space: normal;
    border-radius: var(--r-sm);
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(34px, 5vw, 58px);
}

.page-faq .faq-group {
  scroll-margin-top: 100px;
}

.page-faq .faq-group__head {
  margin-bottom: 20px;
}

.page-faq .faq-group__num {
  display: inline-block;
  margin: 0;
  padding: 4px 11px;
  border-radius: var(--pill);
  border: 1px solid rgba(47, 227, 208, .32);
  background: rgba(47, 227, 208, .07);
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: .16em;
}

.page-faq .faq-group__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-group__desc {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

@media (min-width: 780px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
  .page-faq .faq-steps::before {
    content: "";
    position: absolute;
    top: 22px;
    left: 22px;
    right: 22px;
    height: 1px;
    background: linear-gradient(90deg, rgba(47, 227, 208, .55), rgba(47, 227, 208, .16) 58%, rgba(255, 122, 89, .45));
  }
}

.page-faq .faq-step {
  position: relative;
  padding-top: 60px;
}

.page-faq .faq-step__dot {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink-800);
  border: 1px solid rgba(47, 227, 208, .45);
  color: var(--cyan);
  font-size: 15px;
}

.page-faq .faq-step__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .faq-step__text {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 折叠问答 ---------- */
.page-faq .accordion {
  display: grid;
  gap: 12px;
}

.page-faq .accordion__item {
  position: relative;
  overflow: hidden;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .accordion__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--cyan-soft));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-faq .accordion__item:hover {
  transform: translateY(-2px);
  border-color: rgba(47, 227, 208, .45);
}

.page-faq .accordion__item[open] {
  border-color: rgba(47, 227, 208, .55);
  box-shadow: var(--glow-cyan);
}

.page-faq .accordion__item[open]::before {
  opacity: 1;
}

.page-faq .accordion__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px 18px 24px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--paper);
}

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

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

.page-faq .accordion__summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(47, 227, 208, .4);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 16px;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .accordion__item[open] > .accordion__summary::after {
  transform: rotate(45deg);
  background: rgba(47, 227, 208, .14);
}

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

.page-faq .accordion__body {
  padding: 0 24px 20px;
}

.page-faq .accordion__body p {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 设备与入口 ---------- */
.page-faq .faq-device {
  margin: 0 0 20px;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--line);
}

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

.page-faq .faq-device .media__caption {
  padding: 10px 18px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

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

.page-faq .faq-path {
  padding: 22px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(47, 227, 208, .28);
  background: linear-gradient(158deg, rgba(18, 57, 92, .96), rgba(12, 37, 64, .96));
}

.page-faq .faq-path--coral {
  border-color: rgba(255, 122, 89, .38);
  background: linear-gradient(158deg, rgba(18, 57, 92, .96), rgba(58, 38, 48, .92));
}

.page-faq .faq-path__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-path--coral .faq-path__label {
  color: var(--coral-soft);
}

.page-faq .faq-path__title {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .faq-path__text {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .faq-next .section-head {
  margin-bottom: 22px;
}

.page-faq .faq-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

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

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

.page-faq .faq-next__link {
  display: block;
  padding: 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--ink-800);
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-next__link:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 227, 208, .5);
  background: var(--ink-700);
}

.page-faq .faq-next__link:focus-visible {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 3px;
}

.page-faq .faq-next__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--coral);
}

.page-faq .faq-next__name {
  margin: 10px 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .faq-next__text {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}