.page-faq {
  --faq-cut: 18px;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
}

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(158deg, var(--ink-900) 0%, var(--ink-800) 68%, #10322a 100%);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(20px, 4vw, 34px) clamp(32px, 6vw, 64px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(139, 166, 184, .07) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(139, 166, 184, .05) 0 1px, transparent 1px 64px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 88%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 88%);
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
  opacity: .26;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  max-width: none;
}

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

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.6vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 700;
  margin: 10px 0 16px;
  max-width: 22ch;
}

.page-faq .faq-hero .lede {
  color: rgba(244, 241, 232, .78);
  font-size: clamp(.95rem, 1.4vw, 1.05rem);
  line-height: 1.85;
  max-width: 62ch;
  margin: 0 0 22px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 26px;
  padding-block: clamp(28px, 5vw, 56px) clamp(40px, 6vw, 76px);
}

.page-faq .faq-body > * {
  min-width: 0;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail__title {
  font-size: var(--fs-label);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0 0 12px;
  padding-left: 2px;
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index > li {
  min-width: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 12px 12px 14px;
  border-left: 2px solid var(--line-soft);
  color: var(--mist);
  text-decoration: none;
  font-size: .92rem;
  line-height: 1.5;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--stone);
  transition: color .18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--signal);
  background: var(--signal-dim);
  color: var(--paper);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--signal);
}

.page-faq .faq-rail__figure {
  display: none;
  margin: 20px 0 0;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  background: var(--ink-800);
}

.page-faq .faq-rail__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .8;
}

.page-faq .faq-rail__figure figcaption {
  font-size: .74rem;
  line-height: 1.6;
  color: var(--mist);
  padding: 10px 14px 14px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
  padding-bottom: 26px;
}

.page-faq .faq-group + .faq-group {
  padding-top: 28px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.page-faq .faq-group__num {
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  padding: 4px 8px 5px;
  border: 1px solid rgba(200, 255, 61, .38);
  background: var(--signal-dim);
  flex: 0 0 auto;
}

.page-faq .faq-group__intro h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
  letter-spacing: -.015em;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 6px;
  color: var(--paper);
}

.page-faq .faq-group__intro p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--stone);
  max-width: 56ch;
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(14, 42, 36, .72), rgba(11, 27, 43, .5));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: border-color .18s ease, background-color .18s ease;
}

.page-faq .faq-item:hover {
  border-color: rgba(139, 166, 184, .34);
}

.page-faq .faq-item[open] {
  border-color: rgba(200, 255, 61, .34);
  background: linear-gradient(180deg, rgba(14, 42, 36, .95), rgba(9, 22, 34, .8));
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -.005em;
  line-height: 1.45;
  color: var(--paper);
}

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: -3px;
}

.page-faq .faq-q__sign {
  position: relative;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--line);
  background: rgba(139, 166, 184, .08);
  transition: background-color .18s ease, border-color .18s ease;
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  background: var(--signal);
  transition: opacity .18s ease;
}

.page-faq .faq-q__sign::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1px;
}

.page-faq .faq-q__sign::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1px;
}

.page-faq .faq-item[open] .faq-q__sign {
  border-color: rgba(200, 255, 61, .6);
  background: var(--signal-dim);
}

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

.page-faq .faq-a {
  padding: 0 18px 18px 50px;
  font-size: .94rem;
  line-height: 1.85;
  color: rgba(244, 241, 232, .8);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 66ch;
}

.page-faq .faq-mail {
  font-family: var(--font-num);
  font-size: .88em;
  color: var(--signal);
  word-break: break-all;
}

.page-faq .faq-note {
  margin: 16px 0 0;
  padding: 12px 16px;
  border-left: 2px solid var(--moss);
  background: rgba(79, 111, 90, .14);
  font-size: .85rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-note a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .45);
}

.page-faq .faq-note a:hover {
  border-bottom-color: var(--signal);
}

/* ---------- 继续查找 ---------- */
.page-faq .faq-more {
  scroll-margin-top: 96px;
  margin-top: 34px;
  padding: clamp(22px, 4vw, 34px);
  background: linear-gradient(140deg, rgba(14, 42, 36, .9), rgba(11, 27, 43, .7));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-more__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.8vw, 2.05rem);
  letter-spacing: -.015em;
  font-weight: 700;
  line-height: 1.15;
  margin: 8px 0 8px;
}

.page-faq .faq-more__sub {
  margin: 0 0 20px;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--stone);
  max-width: 54ch;
}

.page-faq .faq-more__grid {
  display: grid;
  gap: 12px;
}

.page-faq .faq-more__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  text-decoration: none;
  color: inherit;
  background: rgba(11, 27, 43, .72);
  border: 1px solid var(--line-soft);
  transition: border-color .18s ease, background-color .18s ease, transform .18s ease;
}

.page-faq .faq-more__card:hover,
.page-faq .faq-more__card:focus-visible {
  border-color: rgba(200, 255, 61, .45);
  background: rgba(14, 42, 36, .92);
  transform: translateY(-2px);
}

.page-faq .faq-more__card .tag {
  align-self: flex-start;
}

.page-faq .faq-more__card strong {
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: -.01em;
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-more__card p {
  margin: 0;
  font-size: .87rem;
  line-height: 1.78;
  color: rgba(244, 241, 232, .72);
}

.page-faq .faq-more__go {
  margin-top: 4px;
  font-size: var(--fs-label);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-more__go::after {
  content: " →";
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-rail__title {
    margin-bottom: 10px;
  }

  .page-faq .faq-index {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }

  .page-faq .faq-index > li {
    flex: 0 0 auto;
  }

  .page-faq .faq-index__link {
    border-left: 0;
    border: 1px solid var(--line-soft);
    padding: 9px 12px;
    white-space: nowrap;
    font-size: .85rem;
    background: rgba(14, 42, 36, .6);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-rail__figure {
    display: block;
  }

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

  .page-faq .faq-q {
    padding: 17px 20px;
    font-size: 1.1rem;
  }

  .page-faq .faq-a {
    padding: 0 24px 20px 54px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-group__head {
    gap: 10px;
  }

  .page-faq .faq-group__num {
    font-size: 1.15rem;
    padding: 3px 6px 4px;
  }

  .page-faq .faq-a {
    padding: 0 14px 16px 16px;
  }

  .page-faq .faq-q {
    padding: 14px;
    font-size: 1rem;
  }

  .page-faq .faq-more {
    padding: 18px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-more__card,
  .page-faq .faq-q__sign {
    transition: none;
  }

  .page-faq .faq-more__card:hover,
  .page-faq .faq-more__card:focus-visible {
    transform: none;
  }
}