/* ================= PAGE: faq ================= */
.page-faq {
  --faq-rail-w: 228px;
  --faq-pad: clamp(1.25rem, 4vw, 2rem);
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏：框景式站牌 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: calc(var(--bar-h) + clamp(2rem, 6vw, 4rem)) 0 clamp(2.5rem, 6vw, 4rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(130% 95% at 10% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(130% 95% at 10% 0%, #000 0%, transparent 74%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(1.25rem, 4vw, 2rem);
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 3.35rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.005em;
  color: var(--white);
  margin: 0.5rem 0 0;
  max-width: 20em;
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 1.15rem 0 0;
  max-width: 48ch;
  font-size: clamp(0.975rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 三步走卡片 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: clamp(1.75rem, 5vw, 2.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-step {
  background: var(--char);
  padding: 1.1rem 1.2rem 1.25rem;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num title"
    "num text";
  column-gap: 0.9rem;
  row-gap: 0.4rem;
  align-items: start;
  position: relative;
  transition: background 180ms var(--ease);
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 42px;
  height: 2px;
  background: var(--cyan);
  opacity: 0.5;
}

.page-faq .faq-step:hover {
  background: var(--deep);
}

.page-faq .faq-step__num {
  grid-area: num;
  font-size: 1.45rem;
  line-height: 1;
  color: var(--cyan);
  opacity: 0.8;
  padding-top: 0.15rem;
}

.page-faq .faq-step__title {
  grid-area: title;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--white);
  line-height: 1.3;
}

.page-faq .faq-step__text {
  grid-area: text;
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.72;
}

@media (min-width: 768px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-step {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "num"
      "title"
      "text";
    padding: 1.4rem 1.4rem 1.6rem;
  }
  .page-faq .faq-step__num {
    font-size: 1.85rem;
  }
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-main {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.75rem, 5vw, 2.75rem);
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
    align-items: start;
  }
}

/* ---------- 左侧问题刻度 ---------- */
.page-faq .faq-rail {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--char);
  padding: 0.9rem 1rem 1rem;
  min-width: 0;
}

.page-faq .faq-rail__label {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.15rem;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-rail__link {
  display: block;
  white-space: nowrap;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.875rem;
  line-height: 1.2;
  color: var(--mint);
  text-decoration: none;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: var(--deep);
  border-color: var(--cyan);
  color: var(--white);
}

@media (min-width: 1024px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 1.25rem);
    padding: 1.1rem 0.85rem 1.1rem 1.1rem;
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
  }
  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 0.6rem 0.7rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    white-space: normal;
    color: var(--gray);
  }
  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
    color: var(--white);
  }
}

/* ---------- 答案流 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: clamp(2.25rem, 6vw, 3.5rem);
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: calc(var(--bar-h) + 1.5rem);
  min-width: 0;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
  min-width: 0;
}

.page-faq .faq-section__head::after {
  content: "";
  flex: 1 1 auto;
  min-width: 1.5rem;
  height: 1px;
  align-self: center;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 4px, transparent 4px 10px);
}

.page-faq .faq-section__idx {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  flex: none;
}

.page-faq .faq-section__title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--white);
  margin: 0;
  min-width: 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: clamp(0.99rem, 2.2vw, 1.0625rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--white);
  transition: color 160ms var(--ease);
}

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

.page-faq .faq-q:hover {
  color: var(--mint);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 2px;
}

.page-faq .faq-q__sign {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 0.3rem;
  position: relative;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: opacity 180ms var(--ease);
}

.page-faq .faq-q__sign::before {
  width: 9px;
  height: 1.5px;
}

.page-faq .faq-q__sign::after {
  width: 1.5px;
  height: 9px;
}

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

.page-faq .faq-item[open] > .faq-q {
  color: var(--white);
}

.page-faq .faq-item[open] .faq-q__sign {
  border-color: var(--orange);
  background: rgba(255, 122, 41, 0.12);
}

.page-faq .faq-item[open] .faq-q__sign::before {
  background: var(--orange);
}

.page-faq .faq-item[open] .faq-q__sign::after {
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 0 1.15rem;
  animation: faqReveal 220ms var(--ease) both;
}

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

.page-faq .faq-a p {
  margin: 0 0 0.6rem;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--gray);
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 160ms var(--ease);
}

.page-faq .faq-a a:hover {
  color: var(--mint);
}

.page-faq .faq-a .num {
  color: var(--mint);
  font-weight: 500;
}

@media (min-width: 768px) {
  .page-faq .faq-a {
    padding-left: 1.75rem;
    border-left: 1px solid var(--line);
  }
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0.25rem;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deep);
  object-fit: cover;
}

.page-faq .faq-figure--wide img {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure--tall img {
  aspect-ratio: 4 / 5;
}

.page-faq .faq-figure figcaption {
  margin-top: 0.7rem;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--gray);
}

/* ---------- 手机上怎么单手用：图文分栏 ---------- */
.page-faq .faq-qa-split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2rem);
  min-width: 0;
}

.page-faq .faq-qa-split__col {
  min-width: 0;
}

.page-faq .faq-qa-split .faq-figure {
  margin-top: 0;
}

@media (min-width: 768px) {
  .page-faq .faq-qa-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(1.75rem, 4vw, 2.75rem);
  }
}

/* ---------- 底部行动区 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--char) 0%, var(--ink) 100%);
  padding: clamp(2.25rem, 6vw, 3.75rem) 0;
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 1.5rem;
  min-width: 0;
}

.page-faq .faq-cta__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--white);
  margin: 0.4rem 0 0;
}

.page-faq .faq-cta__text {
  margin: 0.75rem 0 0;
  max-width: 44ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--gray);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

@media (min-width: 768px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(2rem, 5vw, 3.5rem);
  }
  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a,
  .page-faq .faq-q__sign,
  .page-faq .faq-step,
  .page-faq .faq-rail__link {
    animation: none !important;
    transition-duration: 1ms !important;
  }
}
</main>