.page-faq {
  --faq-rail-w: 236px;
  --faq-sticky-top: calc(var(--header-h) + 20px);
  --faq-line: rgba(244, 248, 246, .075);
  --faq-line-strong: rgba(244, 248, 246, .18);
  display: block;
  background: var(--green-900);
}

.page-faq .faq-crumb-wrap {
  padding-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏框景 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(32px, 5vw, 60px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--faq-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .75;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--signal) 0, var(--signal) 96px, var(--faq-line) 96px, var(--faq-line) 100%);
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: end;
}

.page-faq .faq-hero-copy {
  max-width: 720px;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 6.4vw, 56px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--white);
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--faq-line-strong);
}

.page-faq .faq-fact {
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  min-width: 0;
}

.page-faq .faq-fact dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-fact dd {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
}

.page-faq .faq-hero-media::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--signal) 0%, transparent 78%);
  z-index: 1;
}

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

.page-faq .faq-hero-media .media-cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 主体：索引 + 折叠问答 ---------- */

.page-faq .faq-body {
  padding: clamp(36px, 5vw, 72px) 0 clamp(40px, 6vw, 84px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-rail-inner {
  border: 1px solid var(--faq-line);
  background: var(--green-700);
  padding: 16px;
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal);
  text-transform: uppercase;
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-faq .faq-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 10px;
  border: 1px solid var(--faq-line);
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  transition: border-color var(--speed) ease, background-color var(--speed) ease, color var(--speed) ease;
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  border-color: var(--signal);
  background: rgba(255, 106, 26, .08);
  color: var(--white);
}

.page-faq .faq-rail-num {
  font-size: 12px;
  color: var(--signal-soft);
}

.page-faq .faq-rail-meta {
  margin: 16px 0 12px;
  padding-top: 12px;
  border-top: 1px solid var(--faq-line);
  font-size: 12px;
  color: var(--muted);
}

/* 分组 */

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 5vw, 60px);
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .faq-group-head .section-title {
  margin: 0;
  font-size: clamp(20px, 3.2vw, 28px);
  font-weight: 400;
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-group-head .section-note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 60ch;
}

.page-faq .faq-group:target .faq-group-head {
  border-bottom-color: var(--signal);
}

/* 折叠条目 */

.page-faq .faq-list {
  margin-top: 4px;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  background: transparent;
  transition: background-color var(--speed) ease;
}

.page-faq .faq-item:hover {
  background: rgba(18, 58, 40, .34);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 10px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  outline-offset: -2px;
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 1px solid var(--signal);
}

.page-faq .faq-num {
  font-size: 12px;
  color: var(--signal);
}

.page-faq .faq-q {
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-item[open] > summary {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item[open] .faq-num {
  color: var(--signal-soft);
}

.page-faq .faq-icon {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
}

.page-faq .faq-icon::before,
.page-faq .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--signal-soft);
  transition: transform var(--speed) ease, opacity var(--speed) ease;
}

.page-faq .faq-icon::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1px;
}

.page-faq .faq-icon::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
}

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

.page-faq .faq-a {
  padding: 14px 16px 20px;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 反馈区 ---------- */

.page-faq .faq-feedback {
  padding: clamp(32px, 5vw, 64px) 0;
  background: var(--green-700);
  border-top: 1px solid var(--faq-line-strong);
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .faq-feedback-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-feedback-copy {
  max-width: 620px;
}

.page-faq .faq-feedback-copy .section-title {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 40px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--white);
}

.page-faq .faq-feedback-text {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-faq .faq-contact li {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-contact li:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-contact-key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--signal-soft);
}

.page-faq .faq-contact-val {
  font-size: 14px;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-feedback-copy .btn {
  margin-top: 24px;
}

.page-faq .faq-feedback-media {
  margin: 0;
}

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

/* ---------- 尾部导流 ---------- */

.page-faq .faq-tail {
  padding: clamp(28px, 4vw, 44px) 0;
}

.page-faq .faq-tail-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-tail-text {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-tail-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-faq .faq-tail-links a {
  position: relative;
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color var(--speed) ease, color var(--speed) ease;
}

.page-faq .faq-tail-links a:hover,
.page-faq .faq-tail-links a:focus-visible {
  color: var(--signal-soft);
  border-bottom-color: var(--signal);
}

.page-faq .faq-tail .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-faq .faq-a {
    padding-left: 60px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-rail-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-feedback-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

  .page-faq .faq-tail-inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 24px;
  }

  .page-faq .faq-tail .btn {
    justify-self: end;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-rail-inner {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-item > summary {
    grid-template-columns: 40px minmax(0, 1fr) 18px;
    padding: 18px 20px;
  }

  .page-faq .faq-a {
    padding: 16px 20px 24px 70px;
  }
}