.page-faq {
  --faq-rail: 232px;
  --faq-gap: clamp(28px, 4vw, 56px);
  --faq-shift: 44px;
  background: var(--night);
  color: var(--silver);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 104px);
  overflow-x: clip;
}

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

.page-faq a:hover {
  text-decoration: underline;
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
  font-size: 13px;
  color: var(--silver);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .breadcrumb a {
  color: var(--silver);
}

.page-faq .breadcrumb span[aria-hidden="true"] {
  color: var(--rule-strong);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 6vw, 62px) 0 clamp(26px, 4vw, 42px);
  border-bottom: 1px solid var(--rule-strong);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  left: -40px;
  right: -40px;
  height: 320px;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(52, 241, 212, 0.16), transparent 64%),
    radial-gradient(90% 80% at 92% 10%, rgba(255, 122, 40, 0.10), transparent 66%),
    repeating-linear-gradient(115deg, rgba(195, 207, 214, 0.075) 0 1px, transparent 1px 46px);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  margin: 0 0 18px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6.6vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 0 0 20px;
  max-width: 16em;
}

.page-faq .faq-hero .lead {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--silver);
  margin: 0;
  max-width: 660px;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: clamp(24px, 4vw, 38px) 0 0;
}

.page-faq .faq-hero__stat {
  background: var(--night-3);
  border-top: 2px solid var(--night-3);
  padding: 14px 16px 16px;
}

.page-faq .faq-hero__stat:nth-child(1) {
  border-top-color: var(--cyan);
}

.page-faq .faq-hero__stat:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-faq .faq-hero__stat:nth-child(3) {
  border-top-color: var(--amber);
}

.page-faq .faq-hero__stat:nth-child(4) {
  border-top-color: var(--orange);
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  line-height: 1.4;
  color: var(--silver);
  letter-spacing: 0.04em;
  margin: 0 0 8px;
}

.page-faq .faq-hero__stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1;
  color: var(--white);
}

.page-faq .faq-hero__stat dd span {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--silver);
  margin-left: 4px;
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(26px, 4vw, 46px);
}

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

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
  margin: 0 0 12px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--rule-strong);
  color: var(--silver);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  background: var(--cyan-soft);
  text-decoration: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
}

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

/* ---------- 问答簇 ---------- */

.page-faq .faq-cluster {
  scroll-margin-top: calc(var(--header-h) + 24px);
  margin-bottom: clamp(40px, 6vw, 72px);
}

.page-faq .faq-cluster:last-child {
  margin-bottom: 0;
}

.page-faq .faq-cluster__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 20px;
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 14px;
  margin-bottom: 2px;
}

.page-faq .faq-cluster__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.32rem, 3.2vw, 1.9rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0;
}

.page-faq .faq-cluster__title::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 3px;
  background: var(--cyan);
  vertical-align: middle;
  margin-right: 12px;
  transform: translateY(-2px);
}

.page-faq .faq-cluster__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  border-bottom: 1px solid var(--rule);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
}

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

.page-faq .qa__no {
  flex: 0 0 30px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  line-height: 1.5;
  color: var(--cyan);
  border-top: 1px solid var(--cyan);
  padding-top: 3px;
  margin-top: 5px;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.5;
  color: var(--white);
  transition: color 0.18s ease;
}

.page-faq .qa__q:hover .qa__text,
.page-faq .qa__q:focus-visible .qa__text {
  color: var(--cyan);
}

.page-faq .qa__q::after {
  content: "";
  flex: 0 0 9px;
  width: 9px;
  height: 9px;
  margin: 7px 4px 0 auto;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.2s ease, margin-top 0.2s ease;
}

.page-faq .qa[open] .qa__q::after {
  transform: rotate(-135deg);
  margin-top: 11px;
}

.page-faq .qa__body {
  padding: 0 0 22px var(--faq-shift);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  max-width: 46em;
}

.page-faq .qa__body p:last-child {
  margin-bottom: 0;
}

.page-faq .qa[open] > .qa__body {
  animation: faq-body-in 0.26s ease both;
}

@keyframes faq-body-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 步骤清单 ---------- */

.page-faq .steps {
  list-style: none;
  margin: 12px 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .steps__no {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  background: var(--night-2);
  border: 1px solid var(--rule-strong);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
}

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

/* ---------- 提示条 ---------- */

.page-faq .faq-hint {
  border-left: 2px solid var(--orange);
  background: var(--orange-soft);
  color: var(--panel);
  font-size: 14px;
  line-height: 1.65;
  padding: 11px 14px;
  margin: 12px 0 0;
}

.page-faq .faq-hint--amber {
  border-left-color: var(--amber);
  background: var(--amber-soft);
}

/* ---------- 图 ---------- */

.page-faq .faq-figure {
  margin: 18px 0 6px;
  border: 1px solid var(--rule);
  background: var(--night-3);
}

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

.page-faq .faq-figure__cap {
  border-top: 1px solid var(--rule);
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 联系区 ---------- */

.page-faq .faq-cluster--support {
  background: var(--night-2);
  border: 1px solid var(--rule-strong);
  padding: clamp(20px, 3.6vw, 34px);
}

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 18px 0 0;
}

.page-faq .faq-contact__row {
  background: var(--night);
  padding: 13px 15px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-faq .faq-contact__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-more {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.page-faq .faq-more .btn {
  text-decoration: none;
}

.page-faq .faq-more__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-hero__stats {
    margin-top: clamp(26px, 4vw, 40px);
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq .faq-index__title {
    padding-left: 15px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--rule-strong);
    scrollbar-width: none;
  }

  .page-faq .faq-index__item {
    display: block;
  }

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    min-height: 46px;
    padding: 9px 10px 9px 14px;
    margin-left: -1px;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    font-size: 14px;
    line-height: 1.4;
    text-align: left;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: var(--cyan-soft);
  }

  .page-faq .qa__q {
    padding: 18px 0;
  }

  .page-faq .faq-cluster__title {
    font-size: clamp(1.45rem, 2.3vw, 1.95rem);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-cluster--support {
    padding: 36px 40px 34px;
  }
}

/* ---------- 降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] > .qa__body {
    animation: none;
  }

  .page-faq .qa__q::after,
  .page-faq .qa__text,
  .page-faq .faq-index__link {
    transition: none;
  }
}