.page-faq {
  --faq-line: rgba(23, 74, 53, 0.9);
  --faq-soft: rgba(63, 242, 198, 0.12);
  background:
    radial-gradient(1100px 520px at 88% -10%, rgba(28, 143, 120, 0.22), transparent 70%),
    var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-crumbs {
  padding-top: clamp(14px, 2vw, 22px);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--warm);
}

.page-faq .ak-crumbs a {
  color: var(--warm);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .ak-crumbs a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 52px) 0 clamp(34px, 6vw, 64px);
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -16%;
  width: min(660px, 88vw);
  height: 176%;
  background: linear-gradient(150deg, rgba(28, 143, 120, 0.42), rgba(6, 23, 15, 0) 66%);
  transform: rotate(-7deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(23, 74, 53, 0.5) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(23, 74, 53, 0.32) 0 1px, transparent 1px 96px);
  opacity: 0.55;
  pointer-events: none;
}

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

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 9.6vw, 6rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  margin: 0.32em 0 0.42em;
  max-width: 15ch;
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  color: var(--warm);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.78;
  margin: 0;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 版本条 ---------- */
.page-faq .faq-verbar {
  background: linear-gradient(90deg, rgba(28, 143, 120, 0.3), rgba(11, 42, 29, 0.92));
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-verbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding-top: 13px;
  padding-bottom: 13px;
}

.page-faq .faq-verbar__tag {
  background: var(--neon);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 3px 9px;
  font-weight: 700;
}

.page-faq .faq-verbar__text {
  flex: 1 1 260px;
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--white);
}

.page-faq .faq-verbar__note {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

/* ---------- 通用块 ---------- */
.page-faq .faq-sec {
  padding: clamp(38px, 6vw, 76px) 0;
}

.page-faq .faq-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 5vw, 2.85rem);
  line-height: 1.02;
  letter-spacing: -0.012em;
  margin: 0 0 0.55em;
  color: var(--white);
}

.page-faq .faq-p {
  margin: 0 0 1em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--warm);
  max-width: 44ch;
}

.page-faq .faq-p--lead {
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--warm);
}

.page-faq .ak-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--teal);
  border-left: 2px solid var(--neon);
  padding-left: 12px;
  margin: 18px 0 0;
  display: block;
}

.page-faq .faq-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--neon);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 242, 198, 0.45);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-link:hover {
  color: var(--white);
  border-bottom-color: var(--amber);
}

/* ---------- 版本速览 ---------- */
.page-faq .faq-brief__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 22px;
  padding: 0;
}

.page-faq .faq-chips li {
  border: 1px dashed var(--edge);
  color: var(--warm);
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 5px 11px;
  background: rgba(11, 42, 29, 0.55);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  border-top: 1px solid var(--edge);
  padding-top: 16px;
}

.page-faq .faq-stats__item dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--warm);
  margin-bottom: 6px;
}

.page-faq .faq-stats__item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  color: var(--neon);
  line-height: 1;
}

.page-faq .faq-fig {
  margin: 0;
}

.page-faq .faq-fig .ak-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--edge);
  background: var(--turf);
  box-shadow: 10px 10px 0 rgba(23, 74, 53, 0.5);
}

.page-faq .faq-fig--tall .ak-frame {
  aspect-ratio: 4 / 5;
}

.page-faq .faq-fig--wide .ak-frame {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-fig .ak-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-fig .ak-figure__cap {
  display: block;
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--warm);
}

/* ---------- 分类索引 + 问答 ---------- */
.page-faq .faq-qa__head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-qa__body {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-qa__aside {
  border-top: 1px solid var(--edge);
  padding-top: 16px;
}

.page-faq .faq-vlabel {
  display: block;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--teal);
  margin-bottom: 12px;
}

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

.page-faq .faq-filter__btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--edge);
  color: var(--warm);
  font: inherit;
  font-size: 14px;
  padding: 9px 13px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-filter__btn:hover {
  border-color: var(--neon);
  color: var(--white);
}

.page-faq .faq-filter__btn[aria-pressed="true"] {
  background: var(--faq-soft);
  border-color: var(--neon);
  color: var(--neon);
}

.page-faq .faq-qa__list {
  display: grid;
  gap: 10px;
  counter-reset: faqq;
}

.page-faq .faq-item {
  counter-increment: faqq;
  background: linear-gradient(180deg, rgba(11, 42, 29, 0.96), rgba(11, 42, 29, 0.72));
  border: 1px solid var(--edge);
  border-left: 3px solid var(--edge);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--teal);
  border-left-color: var(--teal);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  border-left-color: var(--neon);
}

.page-faq .faq-item__sum {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) auto 1rem;
  align-items: start;
  gap: 10px;
  padding: 16px clamp(14px, 2vw, 20px);
}

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

.page-faq .faq-item__sum::before {
  content: counter(faqq, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--teal);
  padding-top: 3px;
}

.page-faq .faq-item[open] .faq-item__sum::before {
  color: var(--neon);
}

.page-faq .faq-item__sum::after {
  content: "＋";
  font-size: 15px;
  line-height: 1.3;
  color: var(--neon);
  text-align: right;
  transition: transform 0.18s var(--ease);
}

.page-faq .faq-item[open] .faq-item__sum::after {
  transform: rotate(45deg);
}

.page-faq .faq-item__q {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

.page-faq .faq-item__tag {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--warm);
  border: 1px solid var(--edge);
  padding: 3px 7px;
  white-space: nowrap;
  margin-top: 2px;
}

.page-faq .faq-item__body {
  padding: 0 clamp(14px, 2vw, 20px) 18px 2.2rem;
  border-top: 1px dashed var(--edge);
  margin-top: 2px;
}

.page-faq .faq-item__body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm);
  max-width: 46ch;
}

.page-faq .faq-item__body .faq-link {
  margin-top: 0;
}

/* ---------- 步骤区 ---------- */
.page-faq .faq-steps-block__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px dashed var(--edge);
}

.page-faq .faq-steps li:last-child {
  border-bottom: 1px dashed var(--edge);
}

.page-faq .faq-steps__num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--neon);
  letter-spacing: 0.04em;
  padding-top: 2px;
}

.page-faq .faq-steps li p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--warm);
  max-width: 42ch;
}

/* ---------- 纸张叠层卡 ---------- */
.page-faq .faq-sheets {
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
}

.page-faq .faq-sheet {
  position: relative;
  background: var(--paper);
  color: #12211a;
  padding: clamp(20px, 3vw, 30px);
  box-shadow: 8px 8px 0 rgba(23, 74, 53, 0.6);
}

.page-faq .faq-sheet::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 62px;
  height: 6px;
  background: var(--amber);
}

.page-faq .faq-sheet--note::before {
  background: var(--teal);
}

.page-faq .faq-sheet h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.2vw, 1.55rem);
  line-height: 1.2;
  letter-spacing: -0.008em;
  margin: 0 0 0.6em;
  color: #0a1a12;
}

.page-faq .faq-sheet p {
  margin: 0 0 0.85em;
  font-size: 15px;
  line-height: 1.72;
  color: #22362c;
  max-width: 40ch;
}

.page-faq .faq-sheet__link {
  display: inline-block;
  margin-top: 4px;
  font-size: 14px;
  font-weight: 700;
  color: #0b5c46;
  text-decoration: none;
  border-bottom: 2px solid rgba(255, 122, 26, 0.72);
}

.page-faq .faq-sheet__link:hover {
  color: #0a1a12;
  border-bottom-color: var(--teal);
}

.page-faq .faq-steps-block__side {
  align-self: start;
}

/* ---------- 联系条 ---------- */
.page-faq .faq-contact {
  background: linear-gradient(120deg, rgba(28, 143, 120, 0.28), rgba(11, 42, 29, 0.95));
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(30px, 5vw, 56px) 0;
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact__list li {
  display: grid;
  gap: 4px;
  border-left: 2px solid var(--neon);
  padding-left: 14px;
}

.page-faq .faq-contact__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--warm);
}

.page-faq .faq-contact__v {
  font-size: 15px;
  line-height: 1.5;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .ak-mono.faq-contact__v {
  font-family: var(--font-mono);
  color: var(--neon);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  border: 1px solid var(--edge);
  border-left: 4px solid var(--amber);
  background: rgba(11, 42, 29, 0.62);
  padding: clamp(22px, 4vw, 36px);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats {
    gap: 18px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-brief__grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .page-faq .faq-brief__figure {
    margin-top: -28px;
  }

  .page-faq .faq-steps-block__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-faq .faq-steps-block--flip .faq-steps-block__grid > .faq-steps-block__text {
    order: 2;
  }

  .page-faq .faq-steps-block--flip .faq-steps-block__side {
    order: 1;
    margin-top: 34px;
  }

  .page-faq .faq-sheet:nth-child(2) {
    margin-top: 26px;
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-qa__body {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-qa__aside {
    position: sticky;
    top: 96px;
    border-top: 0;
    border-left: 1px solid var(--edge);
    padding-top: 0;
    padding-left: 18px;
    display: grid;
    grid-template-columns: 18px minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .faq-vlabel {
    writing-mode: vertical-rl;
    margin-bottom: 0;
    letter-spacing: 0.3em;
  }

  .page-faq .faq-filter {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-filter__btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__sum::after,
  .page-faq .faq-filter__btn,
  .page-faq .faq-link {
    transition: none;
  }

  .page-faq .faq-item:hover {
    transform: none;
  }
}