/* ================= 常见问答页 ================= */

.page-faq {
  display: block;
  padding-block-end: clamp(3rem, 7vw, 6rem);
  background:
    radial-gradient(120% 60% at 80% 0%, rgba(47, 224, 240, 0.07), transparent 62%),
    var(--navy-800);
}

/* ---------- 引言 ---------- */

.page-faq .faq-hero {
  padding-block: clamp(2rem, 5vw, 4rem) clamp(1.75rem, 3.5vw, 2.75rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero h1 {
  margin: 0.7rem 0 0;
  max-width: 21ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  margin: 1.15rem 0 0;
  max-width: 60ch;
  color: var(--text-dim);
  font-size: 1.02rem;
  line-height: 1.8;
}

.page-faq .faq-hero__meta {
  margin: 1.35rem 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ---------- 换设备前先对三项 ---------- */

.page-faq .faq-check {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  padding-block: clamp(2.25rem, 5.5vw, 4rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-check__title {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-check__note {
  margin: 0.75rem 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-faq .faq-check__list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-check__list li {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: 1.02rem;
}

.page-faq .faq-check__list .mono {
  flex: none;
  color: var(--cyan);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.page-faq .faq-check__media .media__frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--navy-700);
}

.page-faq .faq-check__media .media__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-check__media .media__cap {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 问题索引 ---------- */

.page-faq .faq-questions {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-questions .section-head__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .section-head__note {
  margin: 0.7rem 0 0;
  color: var(--text-dim);
  font-size: 0.94rem;
  line-height: 1.75;
  max-width: 54ch;
}

.page-faq .tagbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 clamp(1.5rem, 3vw, 2.1rem);
}

.page-faq .tagbar__item {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  line-height: 1;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

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

.page-faq .tagbar__item[aria-pressed="true"] {
  color: var(--navy-950);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 问答列表 ---------- */

.page-faq .qa-list {
  border-top: 1px solid var(--line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 1.1rem 2.4rem 1.1rem 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 1.5vw, 1.22rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  transition: color 0.18s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  right: 0.35rem;
  top: 50%;
  width: 0;
  height: 0;
  margin-top: -3px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--cyan);
  transition: transform 0.2s var(--ease), border-top-color 0.2s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  border-top-color: var(--orange);
  transform: rotate(-180deg);
}

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

.page-faq .qa__code {
  flex: none;
  padding-top: 0.25em;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  opacity: 0.8;
}

.page-faq .qa__a {
  padding: 0 2.4rem 1.4rem 0;
  max-width: 70ch;
  color: var(--text-dim);
  font-size: 0.97rem;
  line-height: 1.85;
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa[open] .qa__a {
  animation: faq-open 0.22s var(--ease);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 注册指引 ---------- */

.page-faq .guide {
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--line-soft);
}

.page-faq .guide .section-head__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .guide-media {
  margin: clamp(1.5rem, 3.5vw, 2.5rem) 0 clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .guide-media .media__frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--navy-700);
}

.page-faq .guide-media .media__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .guide-media .media__cap {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-faq .guide-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: clamp(232px, 76%, 300px);
  gap: 1rem;
  overflow-x: auto;
  padding: 0.25rem 0 1.25rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .guide-track > * {
  scroll-snap-align: start;
}

.page-faq .guide-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 1.3rem 1.15rem 1.4rem;
  background: var(--paper);
  border: 1px solid var(--paper-line);
  color: var(--ink);
  box-shadow: 5px 5px 0 0 rgba(5, 12, 28, 0.6);
}

.page-faq .guide-card__tag {
  display: block;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--paper-line);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.page-faq .guide-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .guide-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.page-faq .guide-steps li {
  display: grid;
  grid-template-columns: 1.6rem minmax(0, 1fr);
  gap: 0.45rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .guide-steps__n {
  font-size: 0.7rem;
  line-height: 1.7rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--navy-700);
}

.page-faq .guide-card__check {
  margin: auto 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--paper-line);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--ink-dim);
}

.page-faq .guide-card__check strong {
  font-weight: 500;
  color: var(--ink);
}

/* ---------- 收束 ---------- */

.page-faq .faq-cta {
  display: grid;
  gap: 1.35rem;
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(1.4rem, 3.2vw, 2.25rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background: linear-gradient(120deg, var(--navy-700), var(--navy-800) 78%);
}

.page-faq .faq-cta__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-cta__text p:last-child {
  margin: 0.8rem 0 0;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 断点 ---------- */

@media (min-width: 780px) {
  .page-faq .faq-check {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
  }

  .page-faq .faq-cta__actions {
    flex-wrap: nowrap;
  }

  .page-faq .qa__a {
    padding-left: 3.6rem;
  }
}

@media (min-width: 1120px) {
  .page-faq .guide-track {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.95rem;
    overflow: visible;
    padding: 0.5rem 0 0;
  }

  .page-faq .guide-card:nth-child(even) {
    transform: translateY(14px);
  }
}

@media (max-width: 560px) {
  .page-faq .qa__code {
    display: none;
  }

  .page-faq .qa__q {
    padding-right: 2rem;
  }

  .page-faq .qa__a {
    padding-right: 1rem;
  }

  .page-faq .tagbar {
    gap: 0.4rem;
  }

  .page-faq .tagbar__item {
    font-size: 0.72rem;
    padding: 0.55rem 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .qa__q::after,
  .page-faq .tagbar__item {
    transition: none;
  }
}