.page-faq {
  --faq-line: rgba(141, 163, 173, .22);
  --faq-pad: clamp(18px, 3vw, 28px);
  position: relative;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-display);
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: min(720px, 82vh);
  background-image:
    linear-gradient(rgba(141, 163, 173, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 163, 173, .08) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 92%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 92%);
  pointer-events: none;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(22px, 4vw, 40px) clamp(30px, 5vw, 60px);
  background: radial-gradient(120% 110% at 88% -10%, rgba(20, 63, 82, .9), transparent 62%);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: end;
  margin-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-hero__title {
  margin: 8px 0 0;
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 46ch;
  color: rgba(246, 241, 230, .88);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-hero__media {
  min-width: 0;
}

.page-faq .faq-hero__data {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--line-cyan);
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
  box-shadow: 0 24px 60px rgba(0, 0, 0, .38);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-figure__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(6, 19, 31, .74);
  border: 1px solid var(--line-cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding-block: clamp(22px, 4vw, 44px) clamp(48px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-toc {
  min-width: 0;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--faq-line);
  background: rgba(12, 37, 54, .74);
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  color: var(--steel);
  letter-spacing: .14em;
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

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

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--faq-line);
  color: var(--paper);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 240, 208, .08);
}

.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-block {
  min-width: 0;
  scroll-margin-top: 96px;
  padding-block: clamp(22px, 3.4vw, 36px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
}

.page-faq .faq-block__head .fs-h2 {
  margin: 0;
}

.page-faq .faq-block > .fs-lead {
  margin: 14px 0 0;
  max-width: 62ch;
  color: rgba(246, 241, 230, .82);
}

/* ---------- 文档卡片 ---------- */
.page-faq .faq-docs {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.page-faq .faq-doc {
  padding: 18px 18px 16px;
  border-radius: 14px;
  border: 1px solid var(--faq-line);
  background: rgba(12, 37, 54, .66);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-doc:hover {
  transform: translateY(-3px);
  border-color: var(--line-cyan);
}

.page-faq .faq-doc__icon {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--cyan);
}

.page-faq .faq-doc .fs-h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.page-faq .faq-doc p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(246, 241, 230, .78);
}

/* ---------- 三步路径 ---------- */
.page-faq .faq-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 18px 18px;
  border-radius: 14px;
  border: 1px solid var(--faq-line);
  background: linear-gradient(160deg, rgba(20, 63, 82, .8), rgba(12, 37, 54, .55));
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 18px;
  top: -1px;
  width: 36px;
  height: 2px;
  background: var(--orange);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-faq .faq-step .fs-h3 {
  margin: 8px 0 6px;
  font-size: 1.08rem;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(246, 241, 230, .8);
}

.page-faq .faq-links {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--steel);
}

.page-faq .faq-links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, .35);
  padding-bottom: 1px;
}

.page-faq .faq-links a:hover {
  border-bottom-color: transparent;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-accordion {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-q {
  border: 1px solid var(--faq-line);
  border-radius: 14px;
  background: rgba(12, 37, 54, .6);
  overflow: hidden;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-q[open] {
  border-color: var(--line-cyan);
  background: rgba(20, 63, 82, .55);
}

.page-faq .faq-q__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  list-style: none;
}

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

.page-faq .faq-q__title::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

.page-faq .faq-q[open] .faq-q__title::after {
  content: "−";
  color: var(--orange);
}

.page-faq .faq-q__title:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-q__body {
  padding: 0 18px 16px;
}

.page-faq .faq-q__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(246, 241, 230, .82);
}

/* ---------- 邮件申请纸面 ---------- */
.page-faq .faq-request {
  margin-top: 20px;
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-panel);
  color: var(--brown);
}

.page-faq .faq-request .fs-h3 {
  margin: 0 0 14px;
  color: var(--brown);
}

.page-faq .faq-request__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-request__list li {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(36, 26, 20, .86);
}

.page-faq .faq-request__k {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: rgba(255, 106, 42, .18);
  color: var(--brown);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
}

.page-faq .faq-request__foot {
  margin: 16px 0 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(36, 26, 20, .8);
  overflow-wrap: anywhere;
}

.page-faq .faq-request__mail {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--brown);
  border-bottom: 2px solid var(--orange);
}

/* ---------- 下载清单 ---------- */
.page-faq .faq-list__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
  margin-top: 20px;
}

.page-faq .faq-list {
  min-width: 0;
}

.page-faq .faq-list__group + .faq-list__group {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-list__group .fs-h3 {
  margin: 0;
  font-size: 1.02rem;
}

.page-faq .faq-list__group ul {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(246, 241, 230, .86);
  border-bottom: 1px solid rgba(141, 163, 173, .14);
}

.page-faq .faq-list__item:last-child {
  border-bottom: 0;
}

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

.page-faq .faq-cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 11;
  object-fit: cover;
  border-radius: var(--radius-panel);
  border: 1px solid var(--line-cyan);
  background: linear-gradient(160deg, var(--cream), var(--paper));
}

.page-faq .faq-cover figcaption {
  margin-top: 10px;
  color: var(--steel);
  line-height: 1.6;
}

/* ---------- 客服面板 ---------- */
.page-faq .faq-mail {
  margin-top: 20px;
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-panel);
}

.page-faq .faq-mail .fs-note {
  margin: 0;
  color: var(--steel);
  letter-spacing: .14em;
}

.page-faq .faq-mail__addr {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.6vw, 1.3rem);
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-faq .faq-mail__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(246, 241, 230, .82);
}

.page-faq .faq-mail__meta {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-mail__meta div {
  min-width: 0;
}

.page-faq .faq-mail__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--steel);
}

.page-faq .faq-mail__meta dd {
  margin: 5px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-mail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-faq .faq-hero__actions .fs-btn {
    flex: 1 1 auto;
    justify-content: center;
    text-align: center;
  }

  .page-faq .faq-doc,
  .page-faq .faq-step,
  .page-faq .faq-q__title,
  .page-faq .faq-q__body {
    padding-left: 15px;
    padding-right: 15px;
  }
}

@media (min-width: 640px) {
  .page-faq .faq-docs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-mail__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-list__grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-toc__link {
    width: 100%;
    padding: 9px 10px;
    border-radius: 10px;
    border-color: transparent;
    font-size: 13.5px;
  }

  .page-faq .faq-toc__link:hover {
    border-color: var(--line-cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-doc,
  .page-faq .faq-q,
  .page-faq .faq-toc__link {
    transition: none;
  }

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