.page-faq {
  --faq-gap: clamp(16px, 3vw, 28px);
  --faq-ink: var(--ink-900);
  background: var(--ink-900);
  color: var(--bone);
  padding-bottom: clamp(40px, 7vw, 88px);
  overflow-x: clip;
}

.page-faq .is-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 2px solid var(--line-soft);
}
.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
  display: block;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(155deg, rgba(4, 31, 26, 0.86) 0%, rgba(11, 58, 49, 0.92) 58%, var(--ink-900) 100%),
    repeating-linear-gradient(90deg, transparent 0 63px, rgba(110, 135, 148, 0.12) 63px 64px);
}
.page-faq .faq-hero__inner {
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(32px, 5vw, 60px);
}
.page-faq .faq-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 8vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 20px 0 0;
  color: var(--bone);
}
.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
}
.page-faq .faq-hero__marks {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-hero .breadcrumb a {
  color: var(--mist);
}
.page-faq .faq-hero .breadcrumb a:hover,
.page-faq .faq-hero .breadcrumb a:focus-visible {
  color: var(--cyan);
}

/* ---------- 快速入口 ---------- */
.page-faq .faq-quick {
  padding: clamp(40px, 6vw, 76px) 0 0;
}
.page-faq .faq-quick__grid {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}
.page-faq .faq-quick__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 20px;
  background: var(--surface-1);
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.page-faq .faq-quick__card:hover,
.page-faq .faq-quick__card:focus-within {
  border-color: var(--line-cyan);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
}
.page-faq .faq-quick__no {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.page-faq .faq-quick__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--bone);
}
.page-faq .faq-quick__text {
  margin: 0 0 6px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}
.page-faq .faq-quick__card .btn {
  margin-top: auto;
  align-self: flex-start;
}

/* ---------- 主体：索引 + 问答 ---------- */
.page-faq .faq-main {
  padding-top: clamp(40px, 6vw, 72px);
}
.page-faq .faq-main__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}
.page-faq .faq-index {
  align-self: start;
  background: var(--surface-2);
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 18px 16px;
}
.page-faq .faq-index__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
  color: var(--cyan);
  text-transform: uppercase;
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 2px 2px 0;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}
.page-faq .faq-index__list a .mono {
  color: var(--slate);
  font-size: 12px;
}
.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(55, 240, 206, 0.08);
}
.page-faq .faq-index__hint {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-panel {
  min-width: 0;
}
.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  margin-bottom: 8px;
  border-bottom: 2px solid var(--line-soft);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: clamp(24px, 4vw, 36px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line-soft);
  color: var(--bone);
}
.page-faq .faq-group__title .mono {
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.06em;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  background: var(--surface-2);
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  margin-bottom: 10px;
  box-shadow: 4px 4px 0 rgba(4, 31, 26, 0.5);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}
.page-faq .faq-item:hover {
  border-color: rgba(55, 240, 206, 0.5);
}
.page-faq .faq-item[open] {
  border-color: var(--line-cyan);
  box-shadow: 6px 6px 0 rgba(55, 240, 206, 0.16);
}
.page-faq .faq-item > summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 15px 46px 15px 16px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.45;
  color: var(--bone);
  transition: color 180ms ease;
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary::marker {
  content: "";
}
.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}
.page-faq .faq-item[open] > summary {
  color: var(--cyan);
}
.page-faq .faq-item[open] > summary::after {
  content: "\2013";
}
.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-faq .faq-item__body {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--line-soft);
  animation: faq-fade 180ms ease both;
}
.page-faq .faq-item__body p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

@keyframes faq-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 配图 ---------- */
.page-faq .faq-shot {
  margin: 22px 0 0;
  max-width: 300px;
}
.page-faq .faq-shot .media-frame {
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-hard);
  background: var(--ink-800);
}
.page-faq .faq-shot img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: cover;
}
.page-faq .faq-shot .media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 仍需帮助 ---------- */
.page-faq .faq-help {
  margin-top: clamp(40px, 6vw, 72px);
}
.page-faq .faq-help__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
  background: var(--ink-700);
  border: 2px solid var(--line-cyan);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  padding: clamp(24px, 4vw, 40px);
}
.page-faq .faq-help__text h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 32px);
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 8px 0 10px;
  color: var(--bone);
}
.page-faq .faq-help__text p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  word-break: break-word;
}
.page-faq .faq-help__text .eyebrow {
  color: var(--cyan);
  letter-spacing: 0.12em;
  font-size: 12px;
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 760px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-quick__card:nth-child(2) {
    margin-top: 18px;
  }
  .page-faq .faq-quick__card:nth-child(3) {
    margin-top: 36px;
  }
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
  .page-faq .faq-item > summary {
    font-size: 17px;
    padding-left: 20px;
  }
  .page-faq .faq-item__body {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-main__grid {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
  .page-faq .faq-shot {
    max-width: 320px;
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__card,
  .page-faq .faq-item,
  .page-faq .faq-index__list a {
    transition: none;
  }
  .page-faq .faq-item__body {
    animation: none;
  }
}