.page-faq {
  --faq-idx: 232px;
  --faq-line: 1px solid var(--line-soft);
  --faq-cell: var(--panel);
  --faq-cell-up: var(--panel-up);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2rem, 5vw, 3rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-hero__title {
  margin: .55rem 0 0;
  font-size: clamp(2.75rem, 8vw, 5.5rem);
  line-height: 1;
  letter-spacing: -.03em;
  font-weight: 900;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: clamp(1rem, 2.5vw, 1.5rem) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.2vw, 1.1rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  padding: .45rem .95rem;
  border-radius: var(--r-pill);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  font-size: .84rem;
  color: var(--muted);
}

.page-faq .faq-hero__facts .mono {
  color: var(--text);
  font-size: .9rem;
  letter-spacing: .01em;
}

.page-faq .faq-hero__seasons {
  display: flex;
  gap: 6px;
  margin-top: clamp(1.5rem, 3vw, 2rem);
  max-width: 420px;
}

.page-faq .faq-hero__seasons span {
  flex: 1 1 auto;
  height: 3px;
  border-radius: 2px;
}

.page-faq .faq-hero__seasons .s-spring { background: var(--spring); }
.page-faq .faq-hero__seasons .s-summer { background: var(--summer); }
.page-faq .faq-hero__seasons .s-autumn { background: var(--autumn); }
.page-faq .faq-hero__seasons .s-winter { background: var(--winter); }

/* ---------- 关键词查找 ---------- */
.page-faq .faq-find {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-faq .faq-find__label {
  display: block;
  margin-bottom: .55rem;
  font-family: var(--font-num);
  font-size: .76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-find__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem;
}

.page-faq .faq-find__input {
  flex: 1 1 260px;
  min-width: 0;
  padding: .8rem 1.15rem;
  border-radius: var(--r-pill);
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--text);
  font-family: var(--font-body);
  font-size: .95rem;
  transition: background-color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-find__input::placeholder {
  color: rgba(168, 183, 176, .72);
}

.page-faq .faq-find__input:hover {
  background: var(--panel-up);
}

.page-faq .faq-find__input:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  border-color: transparent;
}

.page-faq .faq-find__hint {
  font-size: .82rem;
  color: var(--muted);
  letter-spacing: .04em;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(3rem, 7vw, 5rem);
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 .75rem;
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: .5rem;
  margin: 0;
  padding: 0 0 .5rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .55rem;
  padding: .55rem .85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--muted);
  font-size: .88rem;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-index__link:hover {
  background: var(--panel);
  color: var(--text);
  border-color: var(--line);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  color: var(--text);
}

.page-faq .faq-index__num {
  font-size: .74rem;
  color: var(--teal);
  letter-spacing: .04em;
}

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

.page-faq .faq-group + .faq-group,
.page-faq .faq-group + .faq-cta {
  margin-top: clamp(2.5rem, 6vw, 4.25rem);
}

.page-faq .faq-group--install { --faq-season: var(--spring); }
.page-faq .faq-group--fields { --faq-season: var(--summer); }
.page-faq .faq-group--corrections { --faq-season: var(--autumn); }
.page-faq .faq-group--pro { --faq-season: var(--winter); }

.page-faq .faq-group__head {
  margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.page-faq .faq-group__title {
  margin: .3rem 0 .6rem;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-group__title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  margin-top: .75rem;
  border-radius: 2px;
  background: var(--faq-season, var(--teal));
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-group__head--media {
  display: grid;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
}

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

.page-faq .faq-group__media img,
.page-faq .faq-band img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--r-md);
  border: var(--faq-line);
  object-fit: cover;
}

.page-faq .faq-band {
  margin: 0 0 clamp(1rem, 2.5vw, 1.5rem);
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-group__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: .7rem;
}

.page-faq .faq-q {
  background: var(--faq-cell);
  border: var(--faq-line);
  border-left: 2px solid transparent;
  border-radius: var(--r-md);
  margin: 0;
  transition: background-color .25s var(--ease), border-left-color .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-q[open] {
  background: var(--faq-cell-up);
  border-left-color: var(--faq-season, var(--teal));
}

.page-faq .faq-q__head {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-size: .98rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
}

.page-faq .faq-q__head::-webkit-details-marker { display: none; }
.page-faq .faq-q__head::marker { content: ""; }

.page-faq .faq-q__head:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-faq .faq-q__mark {
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: .6rem;
  border-radius: 50%;
  background: var(--faq-season, var(--teal));
}

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

.page-faq .faq-q__sign {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: .45rem;
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  border-radius: 2px;
  background: var(--muted);
  transition: transform .25s var(--ease), opacity .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .faq-q__sign::after {
  transform: rotate(90deg);
}

.page-faq .faq-q[open] .faq-q__sign::before {
  background: var(--faq-season, var(--teal));
}

.page-faq .faq-q[open] .faq-q__sign::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .faq-q__body {
  margin: 0 1.05rem;
  padding: .8rem 0 1.05rem;
  border-top: 1px solid var(--line-soft);
  font-size: .93rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-q__body p {
  margin: 0;
}

.page-faq .faq-q__body a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 230, 193, .35);
  transition: border-color .25s var(--ease);
}

.page-faq .faq-q__body a:hover,
.page-faq .faq-q__body a:focus-visible {
  border-bottom-color: var(--teal);
  outline: none;
}

.page-faq .faq-q__body a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ---------- 参数胶囊 ---------- */
.page-faq .faq-key {
  display: inline-block;
  padding: .05rem .5rem;
  margin: 0 .05rem;
  border-radius: var(--r-pill);
  background: rgba(33, 230, 193, .09);
  border: 1px solid rgba(33, 230, 193, .26);
  color: var(--teal);
  font-size: .82rem;
  letter-spacing: .02em;
  vertical-align: baseline;
}

.page-faq .faq-group--fields .faq-key {
  background: rgba(255, 138, 61, .09);
  border-color: rgba(255, 138, 61, .28);
  color: var(--summer);
}

.page-faq .faq-group--corrections .faq-key {
  background: rgba(242, 179, 61, .09);
  border-color: rgba(242, 179, 61, .28);
  color: var(--autumn);
}

/* ---------- 收尾通道 ---------- */
.page-faq .faq-cta {
  scroll-margin-top: 96px;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: var(--r-lg);
  border: var(--faq-line);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(33, 230, 193, .09) 0%, transparent 58%),
    var(--panel);
}

.page-faq .faq-cta__title {
  margin: .3rem 0 .7rem;
  font-size: clamp(1.4rem, 3vw, 1.95rem);
  line-height: 1.3;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-cta__note {
  margin: 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-cta__contacts {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  display: grid;
  gap: .55rem;
}

.page-faq .faq-cta__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .15rem;
  padding-bottom: .55rem;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-cta__row dt {
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-cta__row dd {
  margin: 0;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

/* ---------- 移动端到桌面端 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-group__head--media {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }

  .page-faq .faq-cta__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-idx) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: .25rem;
  }

  .page-faq .faq-index__link {
    border-radius: var(--r-sm);
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: .5rem .75rem;
  }

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

  .page-faq .faq-group__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: .8rem;
  }
}

@media (min-width: 1180px) {
  .page-faq {
    --faq-idx: 248px;
  }
}

@media (hover: hover) {
  .page-faq .faq-q:hover {
    transform: translateX(2px);
    background: var(--faq-cell-up);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q,
  .page-faq .faq-q__sign::before,
  .page-faq .faq-q__sign::after,
  .page-faq .faq-index__link,
  .page-faq .faq-find__input {
    transition-duration: .01ms !important;
  }

  .page-faq .faq-q:hover {
    transform: none;
  }
}