.page-faq {
  --faq-gap: clamp(20px, 3vw, 48px);
  --faq-ink: var(--data-white);
  --faq-soft: var(--body-soft);
  --faq-line: var(--hairline-soft);
  --faq-card: var(--stand);
  background: var(--abyss);
  color: var(--faq-ink);
  overflow-x: hidden;
}

.page-faq .wrap {
  max-width: var(--wrap-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 14px 0 0;
  font-size: 12px;
  letter-spacing: .06em;
}

.page-faq .breadcrumb__item {
  color: var(--mint);
  text-decoration: none;
}

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

.page-faq .breadcrumb__item--current {
  color: var(--data-white);
}

.page-faq .breadcrumb__sep {
  color: var(--hairline);
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding: clamp(34px, 5.4vw, 76px) 0 clamp(30px, 4.6vw, 62px);
  border-top: 2px solid var(--obsidian);
  border-bottom: 2px solid var(--obsidian);
  background: linear-gradient(142deg, var(--stand-2) 0%, var(--stand) 34%, var(--abyss) 76%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -46%;
  right: -16%;
  width: 62%;
  height: 190%;
  background: linear-gradient(198deg, rgba(37, 244, 208, .2), rgba(37, 244, 208, 0) 62%);
  transform: rotate(13deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -60%;
  width: 44%;
  height: 120%;
  background: linear-gradient(20deg, rgba(255, 176, 32, .14), rgba(255, 176, 32, 0) 70%);
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-hero__title {
  margin: .18em 0 .44em;
  font-size: clamp(2rem, 6.2vw, 4.1rem);
  line-height: 1.02;
  letter-spacing: -.035em;
  font-weight: 900;
  color: var(--faq-ink);
}

.page-faq .faq-hero__text {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(.94rem, 1.05vw, 1.06rem);
  line-height: 1.78;
  color: var(--faq-soft);
}

.page-faq .faq-hero__text .mono {
  color: var(--cyan);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__board {
  display: grid;
  gap: 1px;
  border: 2px solid var(--obsidian);
  background: var(--hairline-soft);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-hero__cell {
  display: grid;
  gap: 4px;
  padding: 16px 18px 18px;
  background: var(--stand);
}

.page-faq .faq-hero__cell b {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  line-height: 1.1;
  font-weight: 700;
  color: var(--amber);
}

.page-faq .faq-hero__unit,
.page-faq .faq-hero__dash {
  font-size: .54em;
  margin-left: .22em;
  color: var(--mint);
}

.page-faq .faq-hero__cap {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mint);
}

/* ---------- 分类入口 ---------- */
.page-faq .faq-hub {
  padding: clamp(40px, 6vw, 86px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hub__head {
  max-width: 66ch;
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-faq .faq-hub__title {
  margin: .3em 0 .4em;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  line-height: 1.08;
  letter-spacing: -.025em;
  font-weight: 800;
  color: var(--faq-ink);
}

.page-faq .faq-hub__head .lede {
  margin: 0;
  color: var(--faq-soft);
  font-size: .98rem;
  line-height: 1.75;
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-cat {
  display: grid;
  gap: 7px;
  padding: 18px 20px 16px;
  background: var(--faq-card);
  border: 2px solid var(--obsidian);
  border-left: 4px solid var(--hairline);
  box-shadow: var(--shadow-hard);
  color: var(--faq-ink);
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, border-left-color .18s ease;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translate(4px, -4px);
  border-left-color: var(--cyan);
  box-shadow: var(--shadow-amber);
}

.page-faq .faq-cat__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-faq .faq-cat__name {
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.page-faq .faq-cat__desc {
  font-size: .84rem;
  line-height: 1.65;
  color: var(--mint);
}

.page-faq .faq-cat__go {
  margin-top: 4px;
  color: var(--cyan);
}

.page-faq .media {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  border: 2px solid var(--obsidian);
  background: var(--stand-2);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-figure {
  margin-top: clamp(24px, 3.4vw, 40px);
  aspect-ratio: 4 / 3;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-figure--tall {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .media__badge {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  padding: 5px 10px;
  background: var(--amber);
  color: var(--obsidian);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
}

.page-faq .media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 10px 14px;
  background: rgba(2, 8, 6, .82);
  color: var(--cyan-soft);
  font-size: 12px;
  line-height: 1.55;
}

/* ---------- 索引 + 正文布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(34px, 5vw, 74px) 0 clamp(48px, 6vw, 96px);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .index-rail__link {
  display: block;
  padding: 9px 12px;
  font-size: .86rem;
  line-height: 1.5;
  color: var(--mint);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}

.page-faq .index-rail__link:hover,
.page-faq .index-rail__link:focus-visible,
.page-faq .index-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(37, 244, 208, .07);
}

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

.page-faq .faq-block {
  padding: clamp(28px, 4.2vw, 56px) 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-block__head {
  max-width: 68ch;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-block__title {
  margin: .3em 0 .5em;
  font-size: clamp(1.35rem, 2.7vw, 2.05rem);
  line-height: 1.14;
  letter-spacing: -.022em;
  font-weight: 800;
  color: var(--faq-ink);
}

.page-faq .faq-block__lede {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--faq-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  margin-bottom: 10px;
  background: var(--faq-card);
  border: 2px solid var(--obsidian);
  border-left: 4px solid var(--hairline);
  transition: border-left-color .18s ease, box-shadow .18s ease;
}

.page-faq .faq-q[open] {
  border-left-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.page-faq .faq-q__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: .98rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--faq-ink);
}

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

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

.page-faq .faq-q__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--cyan);
}

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

.page-faq .faq-q__mark {
  flex: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-faq .faq-q__a {
  padding: 14px 18px 18px 18px;
  border-top: 1px solid var(--faq-line);
  color: var(--faq-soft);
  font-size: .92rem;
  line-height: 1.78;
}

.page-faq .faq-q__a p {
  margin: 0 0 .7em;
}

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

.page-faq .faq-q__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

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

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 16px;
  background: var(--stand-2);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--amber-deep);
  font-size: .9rem;
  line-height: 1.72;
  color: var(--faq-soft);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  line-height: 1.7;
  padding: 2px 7px;
  background: var(--cyan);
  color: var(--abyss);
  font-weight: 700;
}

.page-faq .faq-steps .mono {
  color: var(--cyan);
}

.page-faq .faq-sublist {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 6px;
}

.page-faq .faq-sublist li {
  line-height: 1.72;
}

.page-faq .faq-sublist li::marker {
  color: var(--cyan);
  font-family: var(--font-mono);
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-contact__card {
  padding: 20px 22px 22px;
  background: var(--stand);
  border: 2px solid var(--obsidian);
  border-top: 4px solid var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-contact__card--amber {
  border-top-color: var(--amber);
}

.page-faq .faq-contact__value {
  margin: 8px 0 10px;
  font-size: clamp(1.02rem, 2vw, 1.32rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-contact__card--amber .faq-contact__value {
  color: var(--amber);
}

.page-faq .faq-contact__desc {
  margin: 0;
  font-size: .87rem;
  line-height: 1.72;
  color: var(--mint);
}

.page-faq .faq-notice {
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-notice p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.75;
}

.page-faq .faq-note {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--hairline-amber);
  background: rgba(255, 176, 32, .05);
  font-size: .87rem;
  line-height: 1.75;
  color: var(--mint);
}

.page-faq .faq-note a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline-amber);
}

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

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

  .page-faq .faq-steps li {
    gap: 16px;
    padding: 14px 18px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-figure {
    aspect-ratio: 3 / 1;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(178px, 2.4fr) minmax(0, 9.6fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--hdr-h) + 24px);
    align-self: start;
  }
}

@media (max-width: 1023px) {
  .page-faq .faq-rail__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .index-rail__link {
    white-space: nowrap;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero__actions .btn {
    width: 100%;
    text-align: center;
  }

  .page-faq .faq-q__q {
    gap: 9px;
    padding: 13px 14px;
  }

  .page-faq .faq-q__a {
    padding: 12px 14px 16px;
  }
}

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

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