/* ===== 支持中心 · page-faq ===== */

.page-faq {
  --faq-r: 20px;
  --faq-idx-w: 252px;
  display: block;
  padding-bottom: clamp(56px, 9vw, 112px);
  background:
    radial-gradient(760px 440px at 90% -8%, rgba(0, 224, 198, 0.10), transparent 70%),
    radial-gradient(600px 380px at 4% 30%, rgba(255, 138, 61, 0.07), transparent 72%);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--sb-cyan);
  outline-offset: 2px;
  border-radius: var(--sb-r-xs);
}

/* ---- 首屏 ---- */
.page-faq__hero {
  padding-top: clamp(26px, 5.5vw, 60px);
  padding-bottom: clamp(26px, 5vw, 54px);
}

.page-faq__eyebrow {
  margin: 20px 0 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sb-cyan);
}

.page-faq__title {
  margin: 14px 0 0;
  font-family: var(--sb-sans);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--sb-text);
  max-width: 16em;
}

.page-faq__lede {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.8;
  color: var(--sb-muted);
}

.page-faq__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--sb-line);
  border: 1px solid var(--sb-line);
  border-radius: var(--sb-r);
  overflow: hidden;
}

.page-faq__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--sb-surface);
}

.page-faq__fact-num {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--sb-orange);
}

.page-faq__fact-label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--sb-muted);
}

/* ---- 主体骨架 ---- */
.page-faq__main {
  padding-top: clamp(6px, 1.5vw, 16px);
}

.page-faq__layout {
  display: grid;
  gap: 28px;
}

/* ---- 左侧索引 ---- */
.page-faq__index-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sb-muted);
}

.page-faq__index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq__index-list::-webkit-scrollbar {
  display: none;
}

.page-faq__index-list li {
  flex: 0 0 auto;
}

.page-faq__index-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px 9px 12px;
  border-left: 2px solid var(--sb-line);
  border-radius: 0 var(--sb-r-xs) var(--sb-r-xs) 0;
  color: var(--sb-muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.35;
  white-space: nowrap;
  transition: color var(--sb-dur) var(--sb-ease),
              border-color var(--sb-dur) var(--sb-ease),
              background-color var(--sb-dur) var(--sb-ease);
}

.page-faq__index-link:hover {
  color: var(--sb-text);
  border-left-color: var(--sb-cyan-soft);
}

.page-faq__index-num {
  font-size: 11px;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

/* 滚动联动：章节进入视口后点亮对应索引项 */
.page-faq:has(#cat-account.is-current) .page-faq__index-link[data-idx="account"],
.page-faq:has(#cat-nav.is-current) .page-faq__index-link[data-idx="nav"],
.page-faq:has(#cat-data.is-current) .page-faq__index-link[data-idx="data"],
.page-faq:has(#cat-app.is-current) .page-faq__index-link[data-idx="app"],
.page-faq:has(#cat-coop.is-current) .page-faq__index-link[data-idx="coop"],
.page-faq:has(#cat-prep.is-current) .page-faq__index-link[data-idx="prep"] {
  color: var(--sb-cyan-soft);
  border-left-color: var(--sb-cyan);
  background: rgba(0, 224, 198, 0.09);
}

/* ---- 问答分组 ---- */
.page-faq__body {
  min-width: 0;
}

.page-faq__group {
  scroll-margin-top: calc(var(--sb-head-h) + 24px);
}

.page-faq__group + .page-faq__group {
  margin-top: clamp(34px, 5vw, 60px);
}

.page-faq__group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--sb-line);
  margin-bottom: 18px;
}

.page-faq__group-title {
  margin: 0;
  font-family: var(--sb-sans);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -0.01em;
  color: var(--sb-text);
}

.page-faq__group-count {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sb-cyan);
}

.page-faq__group-lede {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--sb-muted);
}

/* ---- 折叠问答卡 ---- */
.page-faq__qa {
  border: 1px solid var(--sb-line);
  border-radius: var(--faq-r);
  background: var(--sb-card);
  overflow: hidden;
  transition: border-color var(--sb-dur) var(--sb-ease),
              background-color var(--sb-dur) var(--sb-ease);
}

.page-faq__qa + .page-faq__qa {
  margin-top: 10px;
}

.page-faq__qa:hover {
  border-color: rgba(0, 224, 198, 0.3);
}

.page-faq__qa[open] {
  border-color: rgba(0, 224, 198, 0.42);
  background: var(--sb-surface);
}

.page-faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 52px;
  padding: 14px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--sb-text);
}

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

.page-faq__q::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-right: 2px solid var(--sb-cyan);
  border-bottom: 2px solid var(--sb-cyan);
  transform: rotate(45deg);
  transition: transform var(--sb-dur) var(--sb-ease), margin-top var(--sb-dur) var(--sb-ease);
}

.page-faq__qa[open] .page-faq__q::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.page-faq__a {
  padding: 2px 20px 20px;
  animation: pageFaqOpen 0.2s var(--sb-ease) both;
}

.page-faq__a p {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sb-muted);
}

@keyframes pageFaqOpen {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.page-faq__group .sb-figure {
  margin: 22px 0 0;
}

.page-faq__group .sb-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq__back {
  display: inline-block;
  margin-top: 16px;
  padding: 8px 2px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sb-cyan);
  text-decoration: none;
}

.page-faq__back:hover {
  color: var(--sb-cyan-soft);
  text-decoration: underline;
}

/* ---- 准备清单 ---- */
.page-faq__checklist {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq__check-item {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--sb-line);
  border-radius: var(--sb-r-sm);
  background: var(--sb-card);
}

.page-faq__box {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--sb-cyan);
  border-radius: 5px;
  background: rgba(0, 224, 198, 0.08);
}

.page-faq__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--sb-cyan);
  border-bottom: 2px solid var(--sb-cyan);
  transform: rotate(45deg);
}

.page-faq__check-text {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--sb-text);
}

/* ---- 底部引导 ---- */
.page-faq__cta {
  display: grid;
  gap: 22px;
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--sb-line);
  border-radius: var(--sb-r-lg);
  background:
    linear-gradient(135deg, rgba(0, 224, 198, 0.12), transparent 58%),
    var(--sb-surface);
}

.page-faq__cta-title {
  margin: 0;
  font-family: var(--sb-sans);
  font-weight: 900;
  font-size: clamp(21px, 3vw, 30px);
  letter-spacing: -0.01em;
  color: var(--sb-text);
}

.page-faq__cta-text p {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sb-muted);
}

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

.page-faq__more {
  margin: 26px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--sb-muted);
}

.page-faq__more a {
  color: var(--sb-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 224, 198, 0.35);
}

.page-faq__more a:hover {
  color: var(--sb-cyan-soft);
  border-bottom-color: var(--sb-cyan-soft);
}

/* ---- 平板与桌面 ---- */
@media (min-width: 900px) {
  .page-faq__layout {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-faq__index {
    position: sticky;
    top: calc(var(--sb-head-h) + 22px);
  }

  .page-faq__index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq__index-link {
    flex: 1 1 auto;
    white-space: normal;
    padding: 10px 16px 10px 14px;
  }

  .page-faq__cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

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

@media (min-width: 640px) {
  .page-faq__checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__a {
    animation: none;
  }

  .page-faq__q::after,
  .page-faq__index-link,
  .page-faq__qa {
    transition: none;
  }
}
<<<END>>>