.page-faq {
  display: block;
  color: var(--paper);
  padding-bottom: clamp(56px, 8vw, 120px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 52px) 0 clamp(28px, 4vw, 56px);
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -70%;
  width: min(720px, 78vw);
  height: min(720px, 78vw);
  background: radial-gradient(circle at center, rgba(23, 229, 200, 0.15), transparent 64%);
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 3.5vw, 52px);
}

@media (min-width: 940px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: end;
  }
}

.page-faq .faq-kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-fact {
  padding: 14px 16px;
  background: var(--midnight);
}

.page-faq .faq-fact dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-fact dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 24px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-fact dd span {
  display: block;
  margin-top: 4px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-fact--flare dd {
  color: var(--flare);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 4vw, 48px);
  padding-top: clamp(30px, 4.5vw, 68px);
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(206px, 23%) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
    align-items: start;
  }
}

/* ---------- 左侧目录 ---------- */
.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--grid);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}

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

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

@media (min-width: 980px) {
  .page-faq .faq-rail__inner {
    position: sticky;
    top: 76px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-top: 1px solid var(--grid);
  }

  .page-faq .faq-rail__link {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 10px;
    padding: 12px 0;
    border: 0;
    border-bottom: 1px solid var(--grid);
    font-size: 14px;
    white-space: normal;
    color: var(--paper);
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 80px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 2.8vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--grid);
}

.page-faq .qa__q {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 18px 4px 18px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.15s var(--ease);
}

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

.page-faq .qa__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  bottom: 15px;
  width: 3px;
  background: transparent;
  transition: background 0.2s var(--ease);
}

.page-faq .qa__q:hover {
  color: var(--cyan-soft);
}

.page-faq .qa[open] > .qa__q {
  color: var(--cyan-soft);
}

.page-faq .qa[open] > .qa__q::before {
  background: var(--cyan);
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .qa__mark {
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
}

.page-faq .qa__mark::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
}

.page-faq .qa[open] .qa__mark::before,
.page-faq .qa[open] .qa__mark::after {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
}

/* ---------- 答案 ---------- */
.page-faq .qa__a {
  max-width: 62ch;
  padding: 0 4px 24px 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa__a p {
  margin: 0 0 12px;
}

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

.page-faq .qa__a strong {
  color: var(--paper);
  font-weight: 700;
}

.page-faq .qa__a ul {
  margin: 12px 0 14px;
  padding-left: 18px;
}

.page-faq .qa__a li {
  margin-bottom: 8px;
}

.page-faq .qa__a li::marker {
  color: var(--cyan);
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.15s var(--ease);
}

.page-faq .qa__a a:hover {
  color: var(--cyan-soft);
}

.page-faq .num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--paper);
}

.page-faq .num--flare {
  color: var(--flare);
}

.page-faq .qa__mail {
  font-family: var(--font-mono);
  color: var(--cyan-soft);
  word-break: break-all;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 26px;
  border: 1px solid var(--grid);
  background: var(--midnight);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--grid);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 额度进度示意 ---------- */
.page-faq .faq-quota {
  max-width: 520px;
  margin: 4px 0 18px;
  padding: 16px 18px;
  background: var(--midnight);
  border: 1px solid var(--grid);
}

.page-faq .faq-quota__head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-quota__count {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--paper);
}

.page-faq .faq-quota__bar {
  display: flex;
  height: 8px;
  background: var(--void);
  border: 1px solid var(--grid);
}

.page-faq .faq-quota__bar span {
  display: block;
  height: 100%;
  flex: none;
}

.page-faq .faq-quota__used {
  width: 60%;
  background: linear-gradient(90deg, var(--flare), var(--flare-soft));
}

.page-faq .faq-quota__free {
  width: 40%;
  background: linear-gradient(90deg, var(--cyan-soft), var(--cyan));
}

.page-faq .faq-quota__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-quota__legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-faq .faq-quota__legend span::before {
  content: "";
  width: 8px;
  height: 8px;
}

.page-faq .faq-quota__legend .lg-used::before {
  background: var(--flare);
}

.page-faq .faq-quota__legend .lg-free::before {
  background: var(--cyan);
}

/* ---------- 结尾联系块 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 22px;
  margin-top: clamp(48px, 6vw, 88px);
  padding: clamp(22px, 3vw, 36px);
  background: var(--midnight);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--cyan);
}

@media (min-width: 760px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: center;
    gap: 32px;
  }
}

.page-faq .faq-help h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-help p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help__contact p + p {
  margin-top: 6px;
}

.page-faq .faq-help__mail {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.8vw, 17px);
  color: var(--cyan) !important;
  word-break: break-all;
}

.page-faq .faq-help__phone {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper) !important;
  letter-spacing: 0.04em;
}

.page-faq .faq-help__contact p:last-child {
  margin-top: 16px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q,
  .page-faq .qa__q::before,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}