.page-faq {
  --faq-rail: 38px;
  --faq-line: rgba(43, 231, 214, 0.4);
  display: block;
}

@media (min-width: 900px) {
  .page-faq {
    --faq-rail: 84px;
  }
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(20px, 4vw, 44px);
  padding-bottom: clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero__split {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

@media (min-width: 980px) {
  .page-faq .faq-hero__split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

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

.page-faq .faq-hero h1 {
  margin: 12px 0 18px;
  max-width: 18ch;
  font-size: clamp(29px, 5.1vw, 58px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 46ch;
  color: var(--mist);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
}

.page-faq .faq-hero__pulse {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 22px;
}

/* ---------- 跳转面板 ---------- */

.page-faq .faq-jump {
  padding: clamp(20px, 3vw, 30px);
  background:
    linear-gradient(155deg, rgba(28, 44, 87, 0.9), rgba(16, 28, 62, 0.93) 62%, rgba(7, 14, 34, 0.96));
  border: 1px solid rgba(43, 231, 214, 0.22);
  box-shadow: 0 26px 62px -34px rgba(43, 231, 214, 0.5);
}

.page-faq .faq-jump__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-jump__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 4px 11px 0;
  border-bottom: var(--hair);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-faq .faq-jump__list li:last-child a {
  border-bottom: 0;
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  color: var(--cyan);
  padding-left: 6px;
}

.page-faq .faq-jump__list .num {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 竖向导引线长卷 ---------- */

.page-faq .faq-main {
  padding-top: clamp(10px, 2vw, 24px);
}

.page-faq .faq-flow {
  position: relative;
  padding-top: clamp(6px, 1.4vw, 16px);
}

.page-faq .faq-flow::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 48px;
  left: calc(var(--faq-rail) / 2);
  width: 1px;
  transform: translateX(-0.5px);
  background: linear-gradient(
    180deg,
    rgba(43, 231, 214, 0) 0%,
    rgba(43, 231, 214, 0.42) 6%,
    rgba(43, 231, 214, 0.42) 92%,
    rgba(43, 231, 214, 0) 100%
  );
}

.page-faq .faq-item {
  display: grid;
  grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  column-gap: clamp(10px, 2vw, 28px);
  padding: clamp(30px, 4.6vw, 58px) 0;
  border-bottom: var(--hair);
  scroll-margin-top: 120px;
}

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

.page-faq .faq-mark {
  position: relative;
  min-height: 58px;
}

.page-faq .faq-mark__dot {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 11px;
  height: 11px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 16px rgba(43, 231, 214, 0.55);
}

.page-faq .faq-mark__num {
  position: absolute;
  top: 30px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  opacity: 0.85;
}

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

.page-faq .faq-body__title {
  margin: 0 0 12px;
  font-size: clamp(21px, 2.7vw, 30px);
  line-height: 1.34;
  font-weight: 800;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-faq .faq-body__lede {
  margin: 0 0 22px;
  max-width: 62ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}

/* ---------- 现象 / 检查 / 结论 ---------- */

.page-faq .faq-steps {
  display: grid;
  gap: 18px;
  max-width: 72ch;
}

.page-faq .faq-step {
  padding-left: 16px;
  border-left: 2px solid rgba(143, 163, 200, 0.3);
}

.page-faq .faq-step--concl {
  border-left-color: var(--cyan);
}

.page-faq .faq-step__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .faq-step--concl p {
  color: var(--paper);
}

.page-faq .faq-check {
  counter-reset: faqstep;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-check li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 34px;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .faq-check li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.28em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-fold {
  margin-top: 20px;
  padding-top: 14px;
  border-top: var(--hair);
  max-width: 72ch;
}

.page-faq .faq-fold summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.7;
}

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

.page-faq .faq-fold summary::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
  transition: transform 0.25s var(--ease);
}

.page-faq .faq-fold[open] summary::before {
  transform: rotate(45deg);
}

.page-faq .faq-fold p {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 时间线 ---------- */

.page-faq .faq-timeline {
  margin: 0 0 26px;
  padding: clamp(16px, 2.6vw, 26px);
  background: linear-gradient(140deg, rgba(28, 44, 87, 0.72), rgba(7, 14, 34, 0.88));
  border: 1px solid rgba(143, 163, 200, 0.18);
  border-left: 3px solid rgba(43, 231, 214, 0.5);
}

.page-faq .faq-timeline svg {
  display: block;
  width: 100%;
  height: auto;
  font-family: var(--font-display);
}

.page-faq .faq-timeline figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 26px 0 0;
}

.page-faq .faq-shot {
  overflow: hidden;
  background: linear-gradient(150deg, var(--layer), var(--deep) 72%);
  border: 1px solid rgba(143, 163, 200, 0.2);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-faq .faq-figure--narrow {
  max-width: 300px;
}

.page-faq .faq-figure--wide {
  max-width: 100%;
}

@media (min-width: 900px) {
  .page-faq .faq-figure--narrow {
    max-width: 360px;
  }

  .page-faq .faq-figure--wide {
    max-width: 720px;
  }
}

/* ---------- 联系方式块 ---------- */

.page-faq .faq-contact {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  padding: 18px 20px;
  max-width: 62ch;
  background: linear-gradient(120deg, rgba(15, 124, 130, 0.2), rgba(16, 28, 62, 0.62));
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-faq .faq-contact__key {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 边注与清单 ---------- */

.page-faq .faq-body__aside {
  margin: 20px 0 0;
  padding-left: 14px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
  border-left: 1px dashed rgba(143, 163, 200, 0.38);
}

.page-faq .faq-body__aside a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 231, 214, 0.4);
  transition: border-color 0.22s var(--ease);
}

.page-faq .faq-body__aside a:hover,
.page-faq .faq-body__aside a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-pack {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
  max-width: 68ch;
}

.page-faq .faq-pack li {
  position: relative;
  padding-left: 24px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-pack li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 11px;
  height: 2px;
  background: var(--cyan);
}

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

/* ---------- 窄屏兜底 ---------- */

@media (max-width: 560px) {
  .page-faq .faq-hero__pulse .tag {
    font-size: 11.5px;
  }

  .page-faq .faq-item {
    column-gap: 10px;
  }

  .page-faq .faq-step {
    padding-left: 12px;
  }

  .page-faq .faq-check li {
    padding-left: 28px;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__list a,
  .page-faq .faq-fold summary::before,
  .page-faq .faq-body__aside a {
    transition: none;
  }
}