/* ===== 首访教程页 · page-faq ===== */

.page-faq {
  --faq-line: 1px solid var(--c-rule);
  --faq-soft: rgba(0, 229, 255, .05);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(28px, 4vw, 48px);
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 6vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--c-ink-bright);
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

.page-faq .faq-hero__intro a {
  color: var(--c-pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
}

.page-faq .faq-hero__intro a:hover {
  border-bottom-color: var(--c-pulse);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: var(--faq-line);
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: var(--fs-13);
  color: var(--c-ink-dim);
  letter-spacing: .02em;
}

.page-faq .faq-hero__facts .mono {
  font-size: var(--fs-21);
  font-weight: 600;
  color: var(--c-pulse);
  letter-spacing: .06em;
}

.page-faq .faq-hero__window {
  position: relative;
  margin: 0;
  padding: clamp(24px, 4vw, 40px);
  display: grid;
  place-items: center;
  min-height: 260px;
  border-radius: var(--r-l);
  background-image: radial-gradient(120% 90% at 50% 0%, rgba(108, 63, 197, .30), transparent 62%);
  overflow: hidden;
}

.page-faq .faq-orbit {
  position: relative;
  width: min(250px, 74%);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.page-faq .faq-orbit__ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  animation: faq-ring-spin 44s linear infinite;
}

.page-faq .faq-orbit__ring circle,
.page-faq .faq-orbit__ring path {
  fill: none;
}

.page-faq .faq-orbit__ring .ring-outer {
  stroke: var(--c-rule);
  stroke-width: 1;
}

.page-faq .faq-orbit__ring .ring-inner {
  stroke: var(--c-rule);
  stroke-width: 1;
  stroke-dasharray: 2 7;
}

.page-faq .faq-orbit__ring .arc-galaxy {
  stroke: var(--c-galaxy);
  stroke-width: 1.5;
  stroke-linecap: round;
}

.page-faq .faq-orbit__ring .arc-pulse {
  stroke: var(--c-pulse);
  stroke-width: 2;
  stroke-linecap: round;
}

.page-faq .faq-orbit__ring .node-dot {
  fill: var(--c-pulse);
  animation: faq-blip 1.6s ease-in-out infinite;
}

.page-faq .faq-orbit__core {
  position: relative;
  text-align: center;
}

.page-faq .faq-orbit__num {
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--c-ink-bright);
}

.page-faq .faq-orbit__cap {
  margin: 8px 0 0;
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--c-ink-dim);
}

@keyframes faq-ring-spin {
  to { transform: rotate(360deg); }
}

@keyframes faq-blip {
  0%, 100% { opacity: .45; }
  50% { opacity: 1; }
}

/* ---------- 分组入口 ---------- */
.page-faq .faq-nav__head {
  max-width: 62ch;
}

.page-faq .faq-nav__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.32;
  color: var(--c-ink-bright);
}

.page-faq .faq-nav__lead {
  margin: 14px 0 0;
  font-size: var(--fs-15);
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

.page-faq .faq-nav__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-faq .faq-entry {
  position: relative;
  display: block;
  padding: 20px 18px 18px;
  border: var(--faq-line);
  border-radius: var(--r-m);
  background-image: linear-gradient(160deg, rgba(20, 42, 92, .85), rgba(16, 31, 68, .58));
  text-decoration: none;
  overflow: hidden;
  transition: border-color .22s ease, transform .22s ease;
}

.page-faq .faq-entry::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background-image: radial-gradient(circle, rgba(108, 63, 197, .42), transparent 70%);
  opacity: 0;
  transition: opacity .24s ease;
  pointer-events: none;
}

.page-faq .faq-entry:hover,
.page-faq .faq-entry:focus-visible {
  border-color: rgba(0, 229, 255, .55);
  transform: translateY(-3px);
}

.page-faq .faq-entry:hover::after,
.page-faq .faq-entry:focus-visible::after {
  opacity: 1;
}

.page-faq .faq-entry__no {
  display: block;
  font-size: var(--fs-13);
  letter-spacing: .14em;
  color: var(--c-galaxy-2);
}

.page-faq .faq-entry__name {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-17);
  font-weight: 600;
  line-height: 1.45;
  color: var(--c-ink-bright);
}

.page-faq .faq-entry__meta {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

.page-faq .faq-entry__meta .mono {
  color: var(--c-pulse);
  letter-spacing: .06em;
}

.page-faq .faq-entry__bar {
  display: block;
  height: 3px;
  margin-top: 16px;
  border-radius: 2px;
  background-color: var(--c-rule);
  overflow: hidden;
}

.page-faq .faq-entry__bar i {
  display: block;
  height: 100%;
  border-radius: 2px;
  background-image: linear-gradient(90deg, var(--c-galaxy), var(--c-pulse));
}

.page-faq .faq-entry:nth-of-type(1) .faq-entry__bar i { width: 90%; }
.page-faq .faq-entry:nth-of-type(2) .faq-entry__bar i { width: 100%; }
.page-faq .faq-entry:nth-of-type(3) .faq-entry__bar i { width: 80%; }
.page-faq .faq-entry:nth-of-type(4) .faq-entry__bar i { width: 90%; }
.page-faq .faq-entry:nth-of-type(5) .faq-entry__bar i { width: 60%; }

.page-faq .faq-nav__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-faq .faq-nav__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--faq-line);
  border-radius: var(--r-m);
  object-fit: cover;
  background-color: var(--c-hull);
}

.page-faq .faq-nav__figure figcaption {
  margin-top: 12px;
  font-size: var(--fs-12);
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

/* ---------- 问答组 ---------- */
.page-faq .qa-block {
  scroll-margin-top: 112px;
}

.page-faq .faq-nav {
  scroll-margin-top: 112px;
}

.page-faq .qa-details {
  border: var(--faq-line);
  border-radius: var(--r-l);
  background-image: linear-gradient(155deg, rgba(20, 42, 92, .72), rgba(11, 27, 58, .42));
  overflow: hidden;
  transition: border-color .24s ease;
}

.page-faq .qa-details[open] {
  border-color: rgba(0, 229, 255, .38);
}

.page-faq .qa-details__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px 20px;
  min-width: 0;
  padding: clamp(18px, 2.6vw, 26px) clamp(18px, 3vw, 32px);
  list-style: none;
  cursor: pointer;
  transition: background-color .2s ease;
}

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

.page-faq .qa-details__head:hover {
  background-color: var(--faq-soft);
}

.page-faq .qa-details__head:focus-visible {
  outline: 2px solid var(--c-pulse);
  outline-offset: -2px;
}

.page-faq .qa-details__no {
  font-size: var(--fs-13);
  letter-spacing: .14em;
  color: var(--c-galaxy-2);
}

.page-faq .qa-details__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
  line-height: 1.4;
  color: var(--c-ink-bright);
}

.page-faq .qa-details__tail {
  display: inline-flex;
  align-items: center;
  gap: 16px;
}

.page-faq .qa-details__meta {
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--c-ink-dim);
  white-space: nowrap;
}

.page-faq .qa-details__chev {
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--c-pulse);
  border-bottom: 1.5px solid var(--c-pulse);
  transform: rotate(45deg);
  transition: transform .24s ease;
}

.page-faq .qa-details[open] .qa-details__chev {
  transform: rotate(-135deg);
}

.page-faq .qa-details__body {
  padding: 0 clamp(18px, 3vw, 32px) clamp(22px, 3vw, 34px);
  border-top: var(--faq-line);
}

.page-faq .qa-details__note {
  margin: 0 0 20px;
  font-size: var(--fs-13);
  line-height: 1.8;
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

/* 进度刻度 */
.page-faq .qa-gauge {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0 22px;
}

.page-faq .qa-gauge__label {
  flex: none;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--c-ink-dim);
  white-space: nowrap;
}

.page-faq .qa-gauge__track {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  height: 4px;
  border-radius: 2px;
  background-color: var(--c-rule);
  overflow: hidden;
}

.page-faq .qa-gauge__fill {
  display: block;
  height: 100%;
  border-radius: 2px;
  background-image: linear-gradient(90deg, var(--c-galaxy), var(--c-pulse));
}

.page-faq .qa-gauge__track::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(11, 27, 58, .88) 0 1px, transparent 1px 10%);
  pointer-events: none;
}

.page-faq #group-1 .qa-gauge__fill { width: 90%; }
.page-faq #group-2 .qa-gauge__fill { width: 100%; }
.page-faq #group-3 .qa-gauge__fill { width: 80%; }
.page-faq #group-4 .qa-gauge__fill { width: 90%; }
.page-faq #group-5 .qa-gauge__fill { width: 60%; }

/* 组内配图 */
.page-faq .qa-figure {
  margin: 0 0 clamp(22px, 3vw, 30px);
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--faq-line);
  border-radius: var(--r-m);
  object-fit: cover;
  background-color: var(--c-hull);
}

.page-faq .qa-figure figcaption {
  margin-top: 12px;
  font-size: var(--fs-12);
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

/* 问题列表 */
.page-faq .qa-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .qa-item {
  padding: 16px 0 16px 20px;
  border-left: 1px solid var(--c-rule);
  transition: border-color .22s ease;
}

.page-faq .qa-item:hover {
  border-left-color: var(--c-pulse);
}

.page-faq .qa-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 600;
  line-height: 1.65;
  letter-spacing: .01em;
  color: var(--c-ink-bright);
}

.page-faq .qa-item__idx {
  flex: none;
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--c-pulse);
}

.page-faq .qa-item__a {
  margin-top: 10px;
}

.page-faq .qa-item__a p {
  margin: 0;
  max-width: 64ch;
  font-size: var(--fs-15);
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

.page-faq .qa-item__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  padding-bottom: 1px;
  font-size: var(--fs-13);
  letter-spacing: .02em;
  color: var(--c-pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
  transition: border-color .2s ease, color .2s ease;
}

.page-faq .qa-item__link:hover,
.page-faq .qa-item__link:focus-visible {
  color: var(--c-ink-bright);
  border-bottom-color: var(--c-pulse);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail__card {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 3.4vw, 40px);
  border-radius: var(--r-l);
  border: var(--faq-line);
}

.page-faq .faq-tail__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.8vw, 1.65rem);
  line-height: 1.4;
  color: var(--c-ink-bright);
}

.page-faq .faq-tail__text {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: var(--fs-15);
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--c-ink-dim);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-nav__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .85fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-tail__card {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-nav__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (max-width: 620px) {
  .page-faq .qa-details__head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: 8px 12px;
  }

  .page-faq .qa-details__title {
    font-size: var(--fs-17);
  }

  .page-faq .qa-details__tail {
    grid-column: 2;
    justify-content: flex-start;
    gap: 12px;
  }

  .page-faq .qa-details__meta {
    white-space: normal;
  }

  .page-faq .qa-item {
    padding-left: 16px;
  }

  .page-faq .qa-item__q {
    font-size: var(--fs-15);
    gap: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-orbit__ring,
  .page-faq .faq-orbit__ring .node-dot {
    animation: none;
  }

  .page-faq .faq-entry,
  .page-faq .faq-entry::after,
  .page-faq .qa-item,
  .page-faq .qa-details,
  .page-faq .qa-details__chev,
  .page-faq .qa-item__link {
    transition: none;
  }
}