.page-faq {
  --faq-toc-w: 240px;
  --faq-side-w: 296px;
  --faq-paper-link: #0B4A40;
  --faq-pad: clamp(20px, 4vw, 56px);
  display: block;
  padding-bottom: var(--s6);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin: var(--s4) 0 var(--s4);
  padding: clamp(26px, 4.4vw, 56px) var(--faq-pad);
  background:
    radial-gradient(130% 150% at 100% 0%, rgba(69, 241, 208, 0.13), transparent 60%),
    linear-gradient(180deg, var(--panel-locker), var(--bg-abyss));
  box-shadow: inset 0 0 0 1px var(--line-moss);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 32px;
  right: 34px;
  width: 15px;
  height: 15px;
  border-top: 2px solid var(--teal-signal);
  border-right: 2px solid var(--teal-signal);
  opacity: 0.85;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 7px;
  background: repeating-linear-gradient(90deg, var(--line-moss) 0 1px, transparent 1px 12px);
  pointer-events: none;
}

.page-faq .faq-hero__kicker {
  margin: 0;
  color: var(--teal-signal);
}

.page-faq .faq-hero__title {
  margin: var(--s2) 0 0;
  max-width: 22ch;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--text-rice);
}

.page-faq .faq-hero__lede {
  margin: var(--s3) 0 0;
  max-width: 56ch;
  color: var(--text-rock);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2) var(--s4);
  margin: var(--s4) 0 0;
  padding: var(--s3) 0 0;
  border-top: 1px solid var(--line-moss);
}

.page-faq .faq-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-width: 0;
}

.page-faq .faq-hero__fact .num {
  font-size: clamp(19px, 2.3vw, 25px);
  font-weight: 700;
  line-height: 1;
  color: var(--teal-signal);
}

.page-faq .faq-hero__fact > span:last-child {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-rock);
}

/* ---------- 通栏氛围图 ---------- */
.page-faq .faq-banner {
  margin: 0 0 var(--s5);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.06) brightness(0.86);
}

/* ---------- 主从栅格 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s5);
  align-items: start;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: var(--s5);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: var(--s2);
  padding-bottom: 11px;
  background: repeating-linear-gradient(90deg, var(--line-moss) 0 1px, transparent 1px 12px) left bottom / 100% 7px no-repeat;
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal-signal);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 3.2vw, 33px);
  line-height: 1.2;
  color: var(--text-rice);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--text-rock);
}

/* ---------- 问题列表 ---------- */
.page-faq .faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-moss);
}

.page-faq .faq-q__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--s2);
  padding: var(--s3) 0;
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}

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

.page-faq .faq-q__sum::marker {
  content: "";
}

.page-faq .faq-q__sum:focus-visible {
  outline: 2px solid var(--teal-signal);
  outline-offset: 3px;
}

.page-faq .faq-q__idx {
  min-width: 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  color: var(--text-rock);
  border-left: 2px solid var(--line-moss);
  padding-left: 9px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-q__text {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-rice);
  transition: color 0.2s ease;
}

.page-faq .faq-q__sum:hover .faq-q__text {
  color: var(--teal-signal);
}

.page-faq .faq-q__state {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-rock);
  white-space: nowrap;
  transition: color 0.2s ease;
}

.page-faq .faq-q__state::before {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transform-origin: 60% 60%;
  transition: transform 0.24s ease;
}

.page-faq .faq-q__state::after {
  content: "展开";
}

.page-faq .faq-q[open] > .faq-q__sum .faq-q__idx {
  color: var(--teal-signal);
  border-color: var(--teal-signal);
}

.page-faq .faq-q[open] > .faq-q__sum .faq-q__text {
  color: var(--teal-signal);
}

.page-faq .faq-q[open] > .faq-q__sum .faq-q__state {
  color: var(--teal-signal);
}

.page-faq .faq-q[open] > .faq-q__sum .faq-q__state::before {
  transform: rotate(45deg);
}

.page-faq .faq-q[open] > .faq-q__sum .faq-q__state::after {
  content: "收起";
}

/* ---------- 答案纸白面板 ---------- */
.page-faq .faq-q__body {
  max-width: 60ch;
  margin: 0 0 var(--s3);
  padding: var(--s3) var(--s3) var(--s3) clamp(16px, 3vw, 26px);
  background: var(--panel-paper);
  color: var(--ink-deep);
  border-left: 3px solid var(--teal-signal);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-faq .faq-q__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-deep);
}

.page-faq .faq-q__body p + p {
  margin-top: var(--s2);
}

.page-faq .faq-q__body a {
  color: var(--faq-paper-link);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 74, 64, 0.4);
}

.page-faq .faq-q__body a:hover,
.page-faq .faq-q__body a:focus-visible {
  border-bottom-color: var(--faq-paper-link);
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq .faq-q[open] > .faq-q__body {
    animation: faq-answer-in 0.24s ease-out both;
  }
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 口径组侧图 ---------- */
.page-faq .faq-group__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s4);
  margin-top: var(--s3);
}

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

.page-faq .faq-side img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.08) brightness(0.88);
}

/* ---------- 右侧目录 ---------- */
.page-faq .faq-toc {
  border-top: 1px solid var(--line-moss);
  padding-top: var(--s3);
}

.page-faq .faq-toc__label {
  margin: 0;
  color: var(--teal-signal);
}

.page-faq .faq-toc__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: var(--s3) 0 0;
  padding: 0;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 12px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-rock);
  text-decoration: none;
  border: 1px solid var(--line-moss);
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--teal-signal);
  border-color: var(--teal-signal);
}

.page-faq .faq-toc__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--teal-signal);
}

.page-faq .faq-toc__note {
  margin: var(--s3) 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-rock);
}

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

/* ---------- 平板：目录改为顶部横向刻度条 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-toc__list {
    gap: 10px;
  }
}

/* ---------- 桌面：主从两栏 + 侧图 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(0, 1fr) var(--faq-toc-w);
    gap: var(--s5) var(--s4);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--hdr-h) + 18px);
    max-height: calc(100vh - var(--hdr-h) - 40px);
    overflow: auto;
    border-top: 0;
    border-left: 1px solid var(--line-moss);
    padding: 0 0 0 var(--s3);
  }

  .page-faq .faq-toc__list {
    display: block;
    margin-top: var(--s2);
  }

  .page-faq .faq-toc__link {
    padding: 10px 0;
    border: 0;
    border-bottom: 1px dashed var(--line-moss);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr) var(--faq-side-w);
    align-items: start;
  }
}

/* ---------- 窄屏收束 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-hero::before {
    top: 24px;
    right: 26px;
    width: 12px;
    height: 12px;
  }

  .page-faq .faq-group__count {
    display: none;
  }

  .page-faq .faq-q__sum {
    padding: var(--s2) 0;
    gap: 10px;
  }

  .page-faq .faq-q__body {
    padding: var(--s2) var(--s2) var(--s2) 16px;
  }
}