/* ===== 使用教程页 /tutorial/ ===== */
.page-faq {
  --faq-line: rgba(59, 70, 80, .55);
  --faq-line-soft: rgba(59, 70, 80, .30);
  --faq-muted: rgba(233, 238, 241, .78);
  --faq-panel: #1B2126;
  background: var(--karst-ink);
  color: var(--mist-stone);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.75;
}

.page-faq .container {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding-left: var(--page-pad);
  padding-right: var(--page-pad);
  box-sizing: border-box;
}

.page-faq .breadcrumbs {
  padding: 16px var(--page-pad) 0;
  max-width: var(--page-max);
  margin: 0 auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 88px) 0 clamp(28px, 4vw, 52px);
  background:
    radial-gradient(112% 92% at 6% -8%, rgba(20, 160, 165, .34), transparent 58%),
    radial-gradient(78% 66% at 98% 2%, rgba(255, 106, 26, .16), transparent 62%),
    var(--karst-ink);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(59, 70, 80, .34) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(to bottom, rgba(59, 70, 80, .24) 0 1px, transparent 1px 104px);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, .5) 62%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, .5) 62%, transparent 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: var(--step-5);
  font-weight: 900;
  line-height: .96;
  letter-spacing: -.03em;
  color: var(--mist-stone);
  max-width: 15ch;
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: var(--step-1);
  line-height: 1.72;
  color: var(--faq-muted);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(35, 42, 49, .72);
  border-left: 2px solid var(--waterfall-teal);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  font-size: var(--step--1);
  color: var(--faq-muted);
}

.page-faq .faq-hero__facts .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--turf-lime);
  letter-spacing: -.01em;
  white-space: nowrap;
}

/* ---------- 章节骨架：左编号轨 + 右说明栏 ---------- */
.page-faq .faq-block {
  position: relative;
  padding: clamp(40px, 6vw, 76px) 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-block--last {
  border-bottom: 0;
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .faq-block__grid {
  display: grid;
  gap: 18px;
}

.page-faq .faq-block__rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 9vw, 3.4rem);
  font-weight: 700;
  line-height: .82;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1.6px rgba(20, 160, 165, .75);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-block__rail .eyebrow {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
  margin: 0;
}

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

.page-faq .faq-h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.025em;
  color: var(--mist-stone);
}

.page-faq .faq-h3 {
  margin: 22px 0 8px;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--mist-stone);
}

.page-faq .faq-p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--faq-muted);
}

.page-faq .faq-link {
  color: var(--waterfall-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 160, 165, .45);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--turf-lime);
  border-bottom-color: var(--turf-lime);
}

/* ---------- 01 上手路线 ---------- */
.page-faq .route-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .route-list__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 18px;
  background: linear-gradient(180deg, var(--slate-rock), var(--faq-panel));
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  transition: transform .28s var(--ease), background .28s var(--ease);
}

.page-faq .route-list__item:hover {
  transform: translateY(-4px);
  background: linear-gradient(180deg, #2A3239, var(--slate-rock));
}

.page-faq .route-list__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--turf-lime);
}

.page-faq .route-list__text h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--mist-stone);
}

.page-faq .route-list__text p {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--faq-muted);
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

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

.page-faq .faq-split__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-line);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.page-faq .faq-split__cap {
  margin: 10px 0 0;
  font-size: var(--step--1);
  line-height: 1.6;
  color: var(--dim);
}

/* ---------- 02 操作步骤 ---------- */
.page-faq .op-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 6px;
  display: grid;
  gap: 14px;
  border-left: 1px solid rgba(20, 160, 165, .38);
}

.page-faq .op-steps__item {
  position: relative;
  padding-left: 20px;
}

.page-faq .op-steps__item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: .58em;
  width: 7px;
  height: 7px;
  margin-left: -3.5px;
  border-radius: 50%;
  background: var(--waterfall-teal);
  box-shadow: 0 0 0 3px rgba(20, 160, 165, .16);
}

.page-faq .op-steps__item p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.72;
  color: var(--faq-muted);
}

.page-faq .op-steps__item strong {
  color: var(--mist-stone);
  font-weight: 700;
}

/* ---------- 03 收藏 ---------- */
.page-faq .faq-split--media-first .faq-split__media {
  order: 2;
}

/* ---------- 横向问答带 ---------- */
.page-faq .faq-band {
  padding: clamp(38px, 6vw, 68px) 0;
  background:
    linear-gradient(180deg, rgba(20, 160, 165, .10), transparent 60%),
    var(--slate-rock);
  border-top: 1px solid rgba(20, 160, 165, .28);
  border-bottom: 1px solid rgba(20, 160, 165, .28);
}

.page-faq .faq-band__head {
  margin-bottom: 22px;
}

.page-faq .faq-band__head .eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--waterfall-teal);
}

.page-faq .faq-band__head .faq-h2 {
  margin-bottom: 0;
}

.page-faq .faq-band__list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  background: rgba(20, 24, 28, .55);
  border: 1px solid var(--faq-line);
  border-radius: 0;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 15px 46px 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist-stone);
  transition: color .2s var(--ease), background .2s var(--ease);
}

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

.page-faq .qa__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: var(--fog-line);
  transition: background .2s var(--ease);
}

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--pulse-orange);
}

.page-faq .qa__q:hover {
  background: rgba(20, 160, 165, .09);
}

.page-faq .qa__q:hover::before {
  background: var(--waterfall-teal);
}

.page-faq .qa[open] .qa__q::before {
  background: var(--turf-lime);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--turf-lime);
}

.page-faq .qa__a {
  padding: 0 18px 16px 21px;
  overflow: hidden;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.78;
  color: var(--faq-muted);
}

.page-faq .qa[open] .qa__a {
  animation: faq-qa-open .24s var(--ease) both;
}

@keyframes faq-qa-open {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 04 同步 ---------- */
.page-faq .sync-grid {
  display: grid;
  gap: 14px;
  margin: 22px 0 8px;
}

.page-faq .sync-card {
  padding: 18px;
  background: var(--slate-rock);
  border-top: 2px solid var(--pulse-orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform .28s var(--ease);
}

.page-faq .sync-card:hover {
  transform: translateY(-4px);
}

.page-faq .sync-card__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--pulse-orange);
}

.page-faq .sync-card .faq-h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.page-faq .sync-card p {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.72;
  color: var(--faq-muted);
}

/* ---------- 05 刷新时间轴 ---------- */
.page-faq .refresh-axis {
  margin: 24px 0 6px;
}

.page-faq .refresh-axis__marks {
  display: grid;
  gap: 20px;
}

.page-faq .refresh-axis__mark {
  position: relative;
  padding-top: 22px;
}

.page-faq .refresh-axis__dot {
  position: absolute;
  left: 0;
  top: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--karst-ink);
  border: 2px solid var(--waterfall-teal);
}

.page-faq .refresh-axis__mark:last-child .refresh-axis__dot {
  border-color: var(--pulse-orange);
}

.page-faq .refresh-axis__time {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--turf-lime);
}

.page-faq .refresh-axis__desc {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.72;
  color: var(--faq-muted);
}

/* ---------- 06 联系 ---------- */
.page-faq .help-cards {
  display: grid;
  gap: 14px;
  margin: 24px 0 10px;
}

.page-faq .help-card {
  padding: 18px;
  background: linear-gradient(180deg, var(--slate-rock), var(--faq-panel));
  border-left: 3px solid var(--waterfall-teal);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-faq .help-card .eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .help-card__value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--mist-stone);
  word-break: break-all;
}

.page-faq .help-card__value--text {
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 600;
  line-height: 1.6;
  word-break: normal;
}

.page-faq .help-card__note {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--faq-muted);
}

/* ---------- 桌面版 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-block__grid {
    grid-template-columns: minmax(112px, 168px) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-block__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    position: sticky;
    top: 116px;
  }

  .page-faq .faq-block__num {
    font-size: clamp(3.2rem, 5vw, 4.8rem);
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, max-content));
    gap: 14px;
  }

  .page-faq .faq-split {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(24px, 4vw, 46px);
    align-items: start;
  }

  .page-faq .faq-split--media-first {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  }

  .page-faq .faq-split--media-first .faq-split__media {
    order: 0;
  }

  .page-faq .route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .route-list__item:last-child {
    grid-column: span 2;
  }

  .page-faq .faq-band__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .qa:first-child {
    grid-column: span 2;
  }

  .page-faq .sync-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .refresh-axis__marks {
    position: relative;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    padding-top: 4px;
  }

  .page-faq .refresh-axis__marks::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 9px;
    height: 1px;
    background: linear-gradient(90deg, var(--waterfall-teal), var(--turf-lime) 52%, var(--pulse-orange));
    opacity: .55;
  }

  .page-faq .refresh-axis__mark {
    padding-top: 26px;
  }

  .page-faq .help-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__title {
    font-size: clamp(3.4rem, 6.4vw, 6.4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .page-faq .route-list__item:hover,
  .page-faq .sync-card:hover {
    transform: none;
  }
}