/* ============================================================
   page-faq · 答疑中心
   作用域限定在 .page-faq 内
   ============================================================ */

.page-faq {
  --faq-panel-bg: rgba(26, 42, 58, .55);
  --faq-deep: rgba(7, 11, 22, .62);
  --faq-sticky: 6.5rem;
}

/* ---------- 首屏：框景 + 蓝图晕染 ---------- */

.page-faq .faq-masthead {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.25rem, 3.5vw, 2.25rem) clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(58% 72% at 14% -8%, rgba(45, 226, 230, .11), transparent 62%),
    radial-gradient(52% 68% at 88% 2%, rgba(255, 107, 44, .09), transparent 64%);
}

.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(46vw, 420px);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon));
  opacity: .75;
  pointer-events: none;
}

.page-faq .faq-masthead .breadcrumb {
  margin-bottom: clamp(.9rem, 2.5vw, 1.4rem);
}

.page-faq .faq-masthead .lede {
  margin-top: clamp(.85rem, 2vw, 1.15rem);
}

.page-faq .faq-masthead-media {
  margin: clamp(1.5rem, 4vw, 2.75rem) 0 0;
}

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

/* ---------- 首屏数据带 ---------- */

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-stats > li {
  display: grid;
  gap: .3rem;
  padding: .95rem 1.1rem;
  background: var(--void-deep);
}

.page-faq .faq-stat-num {
  font-size: var(--step-1);
  color: var(--cyan);
  letter-spacing: .03em;
  line-height: 1.2;
}

.page-faq .faq-stat-label {
  font-size: var(--step--1);
  color: var(--text-mute);
}

/* ---------- 检索与筛选 ---------- */

.page-faq .faq-controls {
  display: grid;
  gap: clamp(1.1rem, 2.6vw, 1.75rem);
  padding: clamp(1.1rem, 2.6vw, 1.75rem);
  border: 1px solid var(--line);
  background: var(--faq-panel-bg);
}

.page-faq .faq-search {
  display: grid;
  gap: .6rem;
}

.page-faq .faq-search .finder-field {
  width: 100%;
  max-width: 540px;
}

.page-faq .faq-search .finder-input {
  width: 100%;
}

.page-faq .faq-filter {
  display: grid;
  gap: .6rem;
}

.page-faq .faq-filter .filter-bar {
  flex-wrap: wrap;
}

/* ---------- 主体两栏：侧边索引 + 问答组 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-faq .faq-index {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  background: rgba(17, 24, 39, .6);
}

.page-faq .faq-index-head {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .16em;
  color: var(--text-mute);
  text-transform: uppercase;
}

.page-faq .faq-index-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .15rem;
  margin: .85rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .5rem .55rem;
  color: var(--text-dim);
  text-decoration: none;
  font-size: var(--step--1);
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index-list a .mono {
  color: var(--cyan);
  font-size: var(--step--1);
  letter-spacing: .08em;
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--white);
  border-left-color: var(--neon);
  background: rgba(45, 226, 230, .07);
}

.page-faq .faq-groups {
  display: grid;
  gap: clamp(2rem, 4vw, 3.25rem);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 7rem;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group-idx {
  flex: none;
  font-size: var(--step--1);
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.25;
  letter-spacing: .01em;
}

.page-faq .faq-group-count {
  flex: none;
  margin-left: auto;
  font-size: var(--step--1);
  color: var(--text-mute);
}

.page-faq .faq-list {
  display: grid;
  gap: .6rem;
  margin-top: 1.1rem;
}

.page-faq .disclosure-label {
  flex: 1 1 auto;
  min-width: 0;
  text-align: left;
}

.page-faq .disclosure-panel-inner a {
  color: var(--cyan);
}

/* ---------- 联系客服 ---------- */

.page-faq .faq-contact {
  position: relative;
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
  padding: clamp(1.25rem, 3vw, 2.25rem);
  border: 1px solid var(--line-strong);
  background: linear-gradient(150deg, rgba(26, 42, 58, .82), rgba(7, 11, 22, .94));
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
  overflow: hidden;
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  inset: -20% -10%;
  background: linear-gradient(115deg, transparent 44%, rgba(45, 226, 230, .10) 50%, transparent 56%);
  pointer-events: none;
}

.page-faq .faq-contact-copy {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1rem;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-contact-copy .lede {
  margin: 0;
}

.page-faq .faq-contact-note {
  margin: 0;
  font-size: var(--step--1);
  color: var(--text-mute);
}

.page-faq .faq-contact-media {
  position: relative;
  z-index: 1;
  margin: 0;
  min-width: 0;
}

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

/* ---------- 继续浏览 ---------- */

.page-faq .faq-next {
  display: grid;
  gap: .75rem;
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
}

.page-faq .faq-next-label {
  margin: 0;
  font-size: var(--step--1);
  letter-spacing: .16em;
  color: var(--text-mute);
  text-transform: uppercase;
}

.page-faq .faq-next-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: .1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-next-list a {
  display: block;
  padding: .6rem .1rem;
  color: var(--cyan);
  text-decoration: none;
  font-size: var(--step-0);
  border-bottom: 1px dashed var(--line-soft);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-next-list a:hover,
.page-faq .faq-next-list a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--line-strong);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-next-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .1rem 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-index-list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-controls {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-list a,
  .page-faq .faq-next-list a {
    transition: none;
  }
}