.page-faq {
  --faq-border: 2px solid var(--ink-600);
  --faq-border-w: 2px;
  background: var(--ink-900);
}

/* ---------- 首屏 · 缩比比分带 + 标题 ---------- */

.page-faq .faq-hero {
  position: relative;
  border-bottom: var(--faq-border);
  background: var(--ink-900);
  overflow: hidden;
}

.page-faq .faq-hero__media {
  position: relative;
  height: 158px;
  overflow: hidden;
  border-bottom: var(--faq-border);
  background: var(--ink-950);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  filter: brightness(0.3) saturate(0.5) contrast(1.08);
}

.page-faq .faq-hero__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 245, 212, 0.07) 0 1px,
    transparent 1px 5px
  );
  mix-blend-mode: screen;
}

.page-faq .faq-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 20px;
  padding: 9px 20px;
  background: var(--ink-800);
  border-bottom: var(--faq-border);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--steel);
}

.page-faq .faq-band__dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.16);
}

.page-faq .faq-band__item {
  margin: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-band__k {
  color: var(--steel);
}

.page-faq .faq-band__k::after {
  content: "｜";
  color: var(--ink-500);
  margin-left: 4px;
}

.page-faq .faq-band__item .num {
  font-family: var(--mono);
  font-weight: 800;
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-faq .faq-band__item--tail .num {
  color: var(--orange);
}

.page-faq .faq-hero__inner {
  padding: 26px 20px 24px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  background: linear-gradient(112deg, var(--ink-800) 0%, var(--ink-900) 62%);
}

.page-faq .faq-hero__inner .eyebrow {
  font-family: var(--cond);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--relay);
  margin: 0;
}

.page-faq .faq-hero__inner h1 {
  font-family: var(--cond);
  font-weight: 800;
  font-size: clamp(30px, 7.6vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--chalk);
  margin: 10px 0 14px;
  max-width: 18ch;
}

.page-faq .lede {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
  max-width: 58ch;
  margin: 0 0 18px;
}

.page-faq .faq-crumb-current {
  color: var(--cyan);
  font-weight: 700;
}

/* ---------- 主体两列 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 26px 20px 68px;
}

/* ---------- 左侧问题索引 ---------- */

.page-faq .faq-index.toc {
  position: static;
  inset: auto;
  width: auto;
  max-height: none;
  overflow: visible;
  border: var(--faq-border);
  background: var(--ink-800);
  padding: 16px 14px 14px;
  box-shadow: var(--hard);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--cond);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--chalk);
  border-left: 4px solid var(--orange);
  padding-left: 9px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--ink-600);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 11px;
  border: 1px solid var(--ink-600);
  border-bottom: 3px solid var(--ink-600);
  color: var(--steel);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.45;
  white-space: nowrap;
  transition: color 120ms linear, border-color 120ms linear, background 120ms linear;
}

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

.page-faq .faq-index__link.is-active,
.page-faq .faq-index__link:focus-visible {
  color: var(--chalk);
  background: rgba(0, 245, 212, 0.1);
  border-color: var(--dim-cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-index__code {
  font-family: var(--mono);
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-index__link.is-active .faq-index__code {
  color: var(--ink-950);
  background: var(--cyan);
  padding: 1px 4px;
}

.page-faq .faq-index__foot {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
  border-top: 1px dashed var(--ink-600);
  padding-top: 10px;
}

/* ---------- 右侧答案流 ---------- */

.page-faq .faq-stream {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-faq .faq-item {
  position: relative;
  border: var(--faq-border);
  border-left: 4px solid var(--cyan);
  background: var(--ink-800);
  padding: 20px 16px 18px;
  box-shadow: var(--hard);
  scroll-margin-top: 86px;
}

.page-faq .faq-item__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.page-faq .faq-item__code {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid var(--dim-cyan);
  background: rgba(0, 245, 212, 0.08);
  padding: 3px 8px;
}

.page-faq .faq-item__q {
  margin: 0;
  font-family: var(--cond);
  font-weight: 700;
  font-size: clamp(19px, 4.6vw, 26px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-faq .faq-item__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

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

.page-faq .faq-item__lead {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--chalk);
}

.page-faq .faq-item__lead strong {
  color: var(--orange);
  font-weight: 800;
}

.page-faq .faq-answer {
  border-top: 1px dashed var(--ink-600);
  padding-top: 12px;
}

/* 步骤 · 内联 SVG 节点连线 */

.page-faq .faq-wire {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 0 10px;
}

.page-faq .faq-wire line {
  stroke: var(--relay);
  stroke-width: 2;
  opacity: 0.5;
}

.page-faq .faq-wire circle {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 24px;
  font-family: var(--mono);
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  border: 1px solid var(--dim-cyan);
  background: rgba(0, 245, 212, 0.06);
}

.page-faq .faq-item__note {
  margin: 15px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--ink-600);
  font-size: 13px;
  line-height: 1.74;
  color: var(--steel);
}

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

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

/* ---------- 图片 ---------- */

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

.page-faq .faq-figure .media {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--faq-border);
  background: var(--ink-950);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: brightness(0.48) saturate(0.72);
}

.page-faq .faq-figure .media__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--ink-950);
  background: var(--cyan);
  padding: 4px 9px;
}

.page-faq .faq-figure__cap {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 核对标记 ---------- */

.page-faq .faq-marks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px dashed var(--ink-600);
  padding-top: 13px;
}

.page-faq .faq-marks__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  border-left: 3px solid var(--ink-600);
  padding: 4px 0 4px 11px;
}

.page-faq .faq-marks__text {
  font-size: 14px;
  line-height: 1.72;
  color: var(--steel);
}

.page-faq .faq-marks .tag {
  justify-self: start;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border: 1px solid currentColor;
}

.page-faq .faq-marks .tag--done {
  color: var(--turf);
  background: rgba(43, 224, 138, 0.1);
}

.page-faq .faq-marks .tag--live {
  color: var(--cyan);
  background: rgba(0, 245, 212, 0.09);
}

.page-faq .faq-marks .tag--warn {
  color: var(--orange);
  background: rgba(255, 107, 26, 0.12);
}

/* ---------- 联系信息 ---------- */

.page-faq .faq-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border: var(--faq-border);
  background: var(--ink-900);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 12px;
  border-bottom: 1px solid var(--ink-600);
}

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

.page-faq .faq-contact__k {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-faq .faq-contact__v {
  font-size: 14px;
  color: var(--chalk);
  word-break: break-word;
}

.page-faq .faq-contact__v.num {
  font-family: var(--mono);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

/* ---------- 下一步入口 ---------- */

.page-faq .faq-next {
  border: var(--faq-border);
  background: var(--ink-950);
  padding: 20px 16px;
}

.page-faq .faq-next__title {
  margin: 0 0 14px;
  font-family: var(--cond);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--chalk);
}

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

.page-faq .faq-next__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-areas:
    "code label"
    "code desc";
  gap: 2px 10px;
  padding: 12px 10px;
  border-top: 1px solid var(--ink-600);
  text-decoration: none;
  transition: background 120ms linear;
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  background: rgba(0, 245, 212, 0.07);
  outline: none;
}

.page-faq .faq-next__code {
  grid-area: code;
  font-family: var(--mono);
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
  color: var(--orange);
  align-self: center;
}

.page-faq .faq-next__label {
  grid-area: label;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-next__desc {
  grid-area: desc;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--steel);
}

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__media {
    height: 200px;
  }

  .page-faq .faq-hero__inner {
    padding: 32px 32px 28px;
  }

  .page-faq .faq-shell {
    padding: 32px 32px 80px;
  }

  .page-faq .faq-item {
    padding: 24px 22px 22px;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 110px minmax(0, 1fr);
  }

  .page-faq .faq-marks__row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-item__grid {
    grid-template-columns: minmax(0, 1fr) 288px;
    gap: 24px;
    align-items: start;
  }
}

/* ---------- 桌面 · 左侧固定索引 ---------- */

@media (min-width: 1024px) {
  .page-faq .faq-hero__media {
    height: 236px;
  }

  .page-faq .faq-hero__inner {
    padding: 44px 48px 36px;
  }

  .page-faq .faq-hero__inner h1 {
    max-width: 22ch;
  }

  .page-faq .faq-shell {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 40px;
    padding: 44px 48px 96px;
  }

  .page-faq .faq-index.toc {
    position: sticky;
    top: 22px;
    align-self: start;
    max-height: calc(100vh - 44px);
    overflow-y: auto;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 3px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    white-space: normal;
    align-items: flex-start;
    border: 0;
    border-left: 3px solid var(--ink-600);
    padding: 8px 10px;
  }

  .page-faq .faq-index__link:hover {
    border-left-color: var(--cyan);
  }

  .page-faq .faq-index__link.is-active,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
    border-bottom-color: transparent;
  }

  .page-faq .faq-item {
    padding: 28px 26px 24px;
    border-left-width: 5px;
  }

  .page-faq .faq-next {
    padding: 26px 24px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    padding-left: 0;
    padding-right: 0;
  }
}

/* ---------- 减少动态偏好 ---------- */

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