/* ================= 知识中心 · page-faq ================= */

.page-faq {
  --faq-surface: rgba(5, 10, 8, .48);
  --faq-surface-soft: rgba(5, 10, 8, .28);
  --faq-hair: rgba(168, 195, 176, .2);
  color: var(--mist);
}

.page-faq .shell {
  max-width: var(--shell);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3.6vw, 38px) clamp(44px, 6vw, 88px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -58% 30%;
  height: 480px;
  background: radial-gradient(48% 62% at 62% 50%, rgba(124, 255, 107, .2), rgba(124, 255, 107, 0) 72%);
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero-grid {
  margin-top: clamp(18px, 3.2vw, 40px);
  align-items: center;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-title {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 74px);
  line-height: 1.04;
  letter-spacing: -.015em;
  color: var(--mist);
}

.page-faq .faq-hero-copy .lede {
  max-width: 58ch;
  color: var(--sage);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-hero-media {
  min-width: 0;
  margin: 0;
}

.page-faq .faq-hero-media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-l);
  object-fit: cover;
  filter: saturate(1.05);
}

.page-faq .faq-hero-media .media-cap {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3.4vw, 52px);
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: clamp(18px, 2.4vw, 26px) 0 0;
  list-style: none;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-fact-num {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: clamp(21px, 2.8vw, 32px);
  line-height: 1;
  color: var(--kiwi);
}

.page-faq .faq-fact-label {
  font-size: 14px;
  color: var(--sage);
}

/* ---------- 主体分栏 ---------- */

.page-faq .faq-body {
  padding-block: clamp(36px, 5.5vw, 80px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
  align-items: start;
}

/* ---------- 左侧问题索引 ---------- */

.page-faq .faq-index {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-m);
  background: var(--faq-surface-soft);
}

.page-faq .faq-index-label {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 15px;
  border-radius: var(--pill);
  border: 1px solid transparent;
  background: rgba(244, 255, 248, .04);
  color: var(--sage);
  font-size: 13.5px;
  line-height: 1.3;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-index-link .num {
  font-family: var(--font-data);
  font-size: 11.5px;
  color: var(--cyan);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--mist);
  border-color: var(--line-strong);
  background: rgba(77, 240, 214, .1);
}

/* ---------- 答案区 ---------- */

.page-faq .faq-answers {
  display: grid;
  gap: clamp(18px, 2.8vw, 32px);
  min-width: 0;
}

.page-faq .faq-block {
  position: relative;
  min-width: 0;
  padding: clamp(20px, 3vw, 38px);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-l);
  background: linear-gradient(158deg, rgba(14, 43, 31, .86), rgba(26, 16, 51, .72));
  box-shadow: var(--shadow);
  scroll-margin-top: 24px;
}

.page-faq .faq-block--cyan {
  background: linear-gradient(158deg, rgba(14, 43, 31, .9), rgba(11, 39, 45, .78));
}

.page-faq .faq-block--wine {
  background: linear-gradient(158deg, rgba(110, 29, 58, .58), rgba(26, 16, 51, .82));
}

.page-faq .faq-block--indigo {
  background: linear-gradient(158deg, rgba(58, 29, 110, .68), rgba(26, 16, 51, .84));
}

.page-faq .faq-block-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-block-num {
  font-family: var(--font-data);
  font-size: clamp(28px, 4.6vw, 50px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(124, 255, 107, .72);
}

.page-faq .faq-block-title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.2;
  color: var(--mist);
}

.page-faq .faq-block-lead {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sage);
}

/* ---------- 三段式切换 ---------- */

.page-faq .faq-switch-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-faq .faq-switch-tab {
  appearance: none;
  cursor: pointer;
  padding: 8px 20px;
  border-radius: var(--pill);
  border: 1px solid var(--faq-hair);
  background: transparent;
  color: var(--sage);
  font-family: var(--font-data);
  font-size: 13.5px;
  letter-spacing: .06em;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-switch-tab:hover,
.page-faq .faq-switch-tab:focus-visible {
  color: var(--mist);
  border-color: var(--line-strong);
}

.page-faq .faq-switch-tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--kiwi);
  border-color: var(--kiwi);
}

.page-faq .faq-switch-panel {
  display: block;
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-m);
  background: var(--faq-surface);
  scroll-margin-top: 24px;
}

.page-faq .faq-switch-panel + .faq-switch-panel {
  margin-top: 10px;
}

.page-faq .faq-switch-panel[hidden] {
  display: none;
}

.page-faq .faq-panel-kicker {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-points {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-points li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--sage);
}

.page-faq .faq-point-key {
  flex: 0 0 auto;
  min-width: 1.6em;
  padding-top: 2px;
  font-family: var(--font-data);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--kiwi);
}

.page-faq .faq-timeline-figure {
  min-width: 0;
  margin: clamp(20px, 2.8vw, 28px) 0 0;
}

.page-faq .faq-timeline-figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-m);
  object-fit: cover;
}

.page-faq .faq-timeline-figure .media-cap {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--mist);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-q:hover {
  color: var(--kiwi);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-q-mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-left: auto;
  margin-top: 3px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1.5px;
  background: var(--cyan);
  transform: translateY(-50%);
}

.page-faq .faq-q-mark::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-faq .faq-item[open] .faq-q-mark {
  background: rgba(77, 240, 214, .14);
}

.page-faq .faq-item[open] .faq-q-mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 0 18px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-block-foot {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
}

/* ---------- 页尾引导 ---------- */

.page-faq .faq-outro {
  padding-block: clamp(36px, 5vw, 72px);
}

.page-faq .faq-outro-inner {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
}

.page-faq .faq-outro-title {
  margin: 0 0 12px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 36px);
  line-height: 1.2;
  color: var(--mist);
}

.page-faq .faq-outro-copy p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--sage);
}

.page-faq .faq-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-outro-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-faq .faq-outro-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(196px, 232px) minmax(0, 1fr);
    gap: clamp(28px, 3.4vw, 52px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 28px;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
  }

  .page-faq .faq-index-link {
    border-radius: var(--radius-s);
    padding: 9px 12px;
  }

  .page-faq .faq-a {
    padding-left: 0;
  }
}

@media (max-width: 599px) {
  .page-faq .faq-hero-facts {
    gap: 16px 24px;
  }

  .page-faq .faq-hero-facts li {
    flex: 1 1 calc(50% - 24px);
  }

  .page-faq .faq-switch-tab {
    flex: 1 1 auto;
    text-align: center;
  }

  .page-faq .faq-points li {
    font-size: 14.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .faq-switch-tab,
  .page-faq .faq-q,
  .page-faq .faq-q-mark::after {
    transition: none;
  }
}