/* ============ 使用教程页 · page-faq ============ */
.page-faq {
  --faq-toc-w: 236px;
  --faq-hair: rgba(51, 71, 90, 0.55);
  --faq-glow: rgba(47, 216, 200, 0.14);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(70% 110% at 88% -10%, var(--faq-glow), transparent 60%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(0.85rem, 2.2vw, 1.4rem);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(1.9rem, 5.2vw, 3.2rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 60ch;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.6vw, 1.08rem);
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__media {
  margin: clamp(0.5rem, 2vw, 1.2rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--ink-750);
}

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

.page-faq .media-frame__caption {
  display: block;
  padding: 0.6rem 1rem;
  border-top: 1px solid var(--faq-hair);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: start;
}

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

/* ---------- 左侧教程目录 ---------- */
.page-faq .faq-toc {
  min-width: 0;
}

.page-faq .faq-toc__label {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 0.45rem;
  margin: 0 0 0.2rem;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}

.page-faq .faq-toc__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 0.875rem;
  color: var(--text-dim);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 内容区块 ---------- */
.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
  padding-top: clamp(1.7rem, 4vw, 2.6rem);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 0.85rem;
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(1.3rem, 3.2vw, 1.85rem);
  line-height: 1.22;
}

.page-faq .faq-block__lead {
  margin: 0 0 clamp(1.1rem, 2.5vw, 1.6rem);
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- 四步操作 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-steps .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.7rem, 2vw, 1.2rem);
  align-items: start;
  padding: clamp(0.85rem, 2.2vw, 1.25rem) 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-steps .step:first-child {
  padding-top: 0;
}

.page-faq .faq-steps .step:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-steps .step__num {
  position: relative;
  padding-left: 1.3rem;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--cyan);
}

.page-faq .faq-steps .step__num::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--faq-glow);
}

.page-faq .faq-steps .step__title {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .faq-steps .step__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-figure {
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-750);
}

/* ---------- 版本切换 ---------- */
.page-faq .faq-versions {
  display: grid;
  gap: 1rem;
}

.page-faq .faq-version {
  padding: 1.15rem 1.25rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-750);
  transition: border-color 0.22s var(--ease);
}

.page-faq .faq-version:hover {
  border-color: var(--cyan);
}

.page-faq .faq-version__tag {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-version__title {
  margin: 0 0 0.5rem;
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-version__text {
  margin: 0 0 0.85rem;
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-version__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
}

.page-faq .faq-version__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .faq-version__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-switch-note {
  margin-top: 1.25rem;
  padding: 1rem 1.15rem 1.05rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--ink-750);
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-switch-note p {
  margin: 0;
}

.page-faq .faq-switch-note strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 资料下载 ---------- */
.page-faq .faq-tips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-tip {
  display: grid;
  gap: 0.4rem;
  padding: 1.05rem 1.15rem 1.15rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--ink-750);
  transition: border-left-color 0.22s var(--ease);
}

.page-faq .faq-tip:hover {
  border-left-color: var(--cyan-soft);
}

.page-faq .faq-tip__key {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-tip p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- 常见问题分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2rem);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.6rem;
  margin-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-group__count {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .fold {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-750);
  overflow: hidden;
  transition: border-color 0.22s var(--ease);
}

.page-faq .fold + .fold {
  margin-top: 0.6rem;
}

.page-faq .fold:hover {
  border-color: var(--rock);
}

.page-faq .fold[open] {
  border-color: rgba(47, 216, 200, 0.45);
}

.page-faq .fold__summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.95rem 1.1rem 0.95rem 1.25rem;
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .fold__summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 0.75rem;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--cyan);
}

.page-faq .fold[open] .fold__summary::after {
  content: "−";
  color: var(--orange);
}

.page-faq .fold__summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  border-radius: var(--pill);
  background: var(--orange);
  transition: height 0.22s var(--ease);
}

.page-faq .fold[open] .fold__summary::before {
  height: 58%;
}

.page-faq .fold__body {
  padding: 0 1.1rem 1.15rem 1.25rem;
  font-size: 0.93rem;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- 异常与反馈 ---------- */
.page-faq .faq-flow {
  margin: 0;
  padding: 0 0 0 1.4rem;
  list-style: none;
  display: grid;
  gap: 1.3rem;
  border-left: 1px solid var(--rock);
}

.page-faq .faq-flow__item {
  position: relative;
}

.page-faq .faq-flow__item::before {
  content: "";
  position: absolute;
  left: calc(-1.4rem - 6px);
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 2px solid var(--cyan);
}

.page-faq .faq-flow__num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-flow__item h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-flow__item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-status {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.4rem, 3vw, 1.9rem);
}

.page-faq .faq-status__item {
  padding: 1.1rem 1.2rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-750);
}

.page-faq .faq-status__item--self {
  border-left: 4px solid var(--moss);
}

.page-faq .faq-status__item--support {
  border-left: 4px solid var(--clay);
}

.page-faq .faq-status__label {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.22rem 0.7rem;
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.page-faq .faq-status__label--moss {
  color: var(--cyan-soft);
  background: rgba(94, 140, 116, 0.22);
  border: 1px solid rgba(94, 140, 116, 0.6);
}

.page-faq .faq-status__label--clay {
  color: var(--cream);
  background: rgba(184, 92, 58, 0.22);
  border: 1px solid rgba(184, 92, 58, 0.6);
}

.page-faq .faq-status__item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- 教程目录 ---------- */
.page-faq .faq-catalog {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-catalog__row {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-catalog__row:first-child {
  padding-top: 0;
}

.page-faq .faq-catalog__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-catalog__count {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: var(--cyan);
}

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

.page-faq .faq-catalog__name {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-catalog__desc {
  display: block;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-faq .faq-updates {
  margin-top: clamp(1.5rem, 3vw, 2rem);
  padding: 1.1rem 1.2rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-900);
}

.page-faq .faq-updates__label {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-updates__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.page-faq .faq-updates__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: baseline;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .faq-updates__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  transform: translateY(-0.18em);
}

.page-faq .faq-updates__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-next {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-next__inner {
  display: grid;
  gap: 1rem;
  justify-items: start;
}

.page-faq .faq-next__title {
  margin: 0;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1.22;
}

.page-faq .faq-next__text {
  margin: 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.35rem;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-faq .faq-tip {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.1rem;
  }

  .page-faq .faq-updates__item {
    font-size: 0.94rem;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-versions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 0.1rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    border: 0;
    border-radius: 0;
    border-left: 2px solid var(--rock);
    padding: 0.55rem 0.9rem;
    white-space: normal;
    line-height: 1.6;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-version,
  .page-faq .faq-tip,
  .page-faq .fold,
  .page-faq .fold__summary,
  .page-faq .fold__summary::before {
    transition: none;
  }
}
</main>