.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: clamp(24px, 3.4vw, 48px);
  --faq-neon-line: rgba(53, 230, 168, 0.45);
  --faq-card: #101413;
  --faq-card-open: #14302A;
  color: var(--body-text);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 4.5vw, 48px) 0 clamp(22px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -34%;
  right: -18%;
  width: min(560px, 74vw);
  height: 176%;
  transform: skewX(-16deg);
  background: linear-gradient(150deg, rgba(53, 230, 168, 0.15), rgba(255, 92, 51, 0.07) 54%, transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(16px, 3vw, 28px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 10px 0 16px;
  max-width: 17ch;
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding: clamp(16px, 2.4vw, 20px) 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(24px, 5vw, 56px);
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  color: var(--neon);
  letter-spacing: 0.02em;
}

.page-faq .faq-stat__label {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- 快速索引 ---------- */
.page-faq .faq-index {
  padding: clamp(34px, 5.5vw, 64px) 0 clamp(8px, 2vw, 20px);
}

.page-faq .faq-index__grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
}

.page-faq .faq-index__figure {
  margin: 0;
}

.page-faq .faq-index__figure img,
.page-faq .faq-inline-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-faq .faq-index__figure .media__cap,
.page-faq .faq-inline-figure .media__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-index__title {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--neon);
  display: inline-block;
}

.page-faq .faq-seat {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-seat__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  row-gap: 3px;
  padding: 15px 18px;
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink-3);
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .faq-seat__link:hover {
  transform: translateY(-2px);
  border-color: var(--faq-neon-line);
  border-left-color: var(--neon);
  background: var(--faq-card-open);
}

.page-faq .faq-seat__link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-seat__num {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--neon);
}

.page-faq .faq-seat__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-seat__desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  padding-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-rail {
  border-top: 2px solid var(--neon);
  padding-top: 14px;
  background: linear-gradient(180deg, rgba(53, 230, 168, 0.07), transparent 72%);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  white-space: nowrap;
  padding: 8px 14px;
  font-size: 14.5px;
  color: var(--muted);
  text-decoration: none;
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--neon);
  background: rgba(53, 230, 168, 0.1);
  outline: none;
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon);
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 54px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--ember);
  letter-spacing: 0.02em;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.2vw, 29px);
  font-weight: 700;
  letter-spacing: 0.015em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 5px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-inline-figure {
  margin: 0 0 18px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 8px;
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item[open] {
  background: var(--faq-card-open);
  border-color: var(--faq-neon-line);
}

.page-faq .faq-item > summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 18px 15px 22px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}

.page-faq .faq-item[open] > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: var(--neon);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--neon);
}

.page-faq .faq-answer {
  padding: 0 20px 18px 22px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-answer p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-answer a {
  color: var(--neon-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--neon);
}

.page-faq .faq-figure {
  font-family: var(--font-mono);
  font-size: 0.95em;
  letter-spacing: 0.04em;
  color: var(--neon);
}

/* ---------- 求助区 ---------- */
.page-faq .faq-help {
  margin-top: clamp(40px, 6vw, 68px);
  padding: clamp(22px, 3.6vw, 36px);
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(125deg, rgba(255, 92, 51, 0.11), rgba(53, 230, 168, 0.08) 58%, transparent 88%);
  scroll-margin-top: 96px;
}

.page-faq .faq-help h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  letter-spacing: 0.015em;
  color: var(--paper);
}

.page-faq .faq-help__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-help__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-help__note {
  margin: 0 0 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 940px) {
  .page-faq .faq-index__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    padding: 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--neon);
    background: rgba(53, 230, 168, 0.08);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-inline-figure {
    margin-bottom: 22px;
  }
}