.page-faq {
  --faq-rail: 196px;
  --faq-gap: 44px;
  --faq-panel: #0A1A14;
  background: var(--ink);
  color: var(--paper);
}

/* 顶部窄幅横幅 */
.page-faq .faq-banner {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: cover;
  opacity: 0.45;
  filter: saturate(0.55) contrast(1.08);
}
.page-faq .faq-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 18, 14, 0.25) 0%, rgba(6, 18, 14, 0.9) 88%, var(--ink) 100%);
  pointer-events: none;
}
.page-faq .faq-banner__cap {
  position: absolute;
  left: 20px;
  bottom: 14px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  z-index: 1;
}

/* 页面头部 */
.page-faq .faq-head {
  position: relative;
  overflow: hidden;
  padding: 26px 0 22px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-head__ghost {
  position: absolute;
  right: -10px;
  top: -22px;
  font-family: var(--font-mono);
  font-size: clamp(72px, 16vw, 148px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(30, 76, 62, 0.85);
  opacity: 0.55;
  pointer-events: none;
  user-select: none;
}
.page-faq .faq-head h1 {
  position: relative;
  margin: 0;
  max-width: 18em;
  font-family: var(--font-cn);
  font-weight: 900;
  font-size: clamp(28px, 6.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-faq .faq-lede {
  position: relative;
  max-width: 40em;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* 数字条 */
.page-faq .faq-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-faq .faq-facts__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 13px 14px;
  background: var(--panel-1);
}
.page-faq .faq-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 4.6vw, 28px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}
.page-faq .faq-facts__label {
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 布局 */
.page-faq .faq-layout {
  padding-top: 26px;
}
.page-faq .faq-body {
  min-width: 0;
}

/* 主题索引 */
.page-faq .faq-index {
  margin-bottom: 10px;
}
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 12px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease-score), border-color 0.2s var(--ease-score), background 0.2s var(--ease-score);
}
.page-faq .faq-index__letter {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: var(--panel-2);
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: 20px;
  padding-top: 4px;
}
.page-faq .faq-group + .faq-group {
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 14px;
  align-items: baseline;
  margin-bottom: 14px;
}
.page-faq .faq-group__letter {
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 36px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}
.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: clamp(19px, 3.6vw, 27px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-group__note {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* 问答条目 */
.page-faq .faq-q {
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-q:first-child {
  border-top: 1px solid var(--line);
}
.page-faq .faq-q__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}
.page-faq .faq-q__btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 12px 15px 0;
  background: transparent;
  border: 0;
  color: var(--paper);
  font-family: var(--font-cn);
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s var(--ease-score);
}
.page-faq .faq-q__btn:hover,
.page-faq .faq-q__btn:focus-visible {
  color: var(--cyan);
}
.page-faq .faq-q__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-faq .faq-q__text {
  min-width: 0;
}
.page-faq .faq-q__sign {
  flex: 0 0 auto;
  width: 0;
  height: 0;
  margin-top: 7px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--muted);
  transition: transform 0.24s var(--ease-score), border-left-color 0.2s var(--ease-score);
}
.page-faq .faq-q__btn[aria-expanded="true"] .faq-q__sign {
  transform: rotate(90deg);
  border-left-color: var(--cyan);
}
.page-faq .faq-q__panel {
  background: var(--faq-panel);
  border-left: 2px solid var(--line);
}
.page-faq .faq-q__panel[hidden] {
  display: none;
}
.page-faq .faq-q__panel > .disclosure__body {
  padding: 14px 16px 18px;
}
.page-faq .faq-q__panel p {
  max-width: 36em;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .faq-q__panel a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-q__panel a:hover,
.page-faq .faq-q__panel a:focus-visible {
  color: var(--white);
}

/* 入口分组旁的信息图 */
.page-faq .faq-figure {
  margin: 20px 0 0;
}
.page-faq .faq-figure .figure__media {
  border: 1px solid var(--line);
  background: var(--panel-2);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure .figure__caption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 结尾求助块 */
.page-faq .faq-help {
  margin: 44px 0 56px;
  padding: 26px 20px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}
.page-faq .faq-help .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
}
.page-faq .faq-help h2 {
  margin: 10px 0 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: clamp(19px, 3.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-help p {
  max-width: 38em;
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-faq .faq-banner img {
    height: 190px;
  }
  .page-faq .faq-banner__cap {
    left: 40px;
  }
  .page-faq .faq-head {
    padding: 34px 0 26px;
  }
  .page-faq .faq-lede {
    font-size: 16px;
  }
  .page-faq .faq-q__btn {
    padding: 17px 16px 17px 0;
    font-size: 16px;
  }
  .page-faq .faq-help {
    padding: 32px 30px;
    margin: 52px 0 68px;
  }
  .page-faq .faq-figure {
    max-width: 520px;
  }
}

/* 桌面：索引作为左侧框架 */
@media (min-width: 960px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
    padding-top: 34px;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    margin-bottom: 0;
  }
  .page-faq .faq-index__title {
    margin-bottom: 12px;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }
  .page-faq .faq-index__link {
    width: 100%;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    background: transparent;
    white-space: normal;
    font-size: 13.5px;
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: transparent;
  }
}

/* 宽屏：入口分组右侧挂图 */
@media (min-width: 1100px) {
  .page-faq .faq-group--split .faq-group__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 232px;
    gap: 34px;
    align-items: start;
  }
  .page-faq .faq-group--split .faq-figure {
    margin: 4px 0 0;
    max-width: none;
  }
  .page-faq .faq-head {
    padding-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__sign,
  .page-faq .faq-q__btn,
  .page-faq .faq-index__link {
    transition: none;
  }
}