.page-faq {
  --faq-gap: clamp(16px, 2.2vw, 26px);
  --faq-edge: 2px;
  --faq-ink-soft: rgba(34, 24, 19, .76);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(22px, 4.5vw, 52px) clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(16px, 2.4vw, 28px);
}

.page-faq .faq-hero__lead .label {
  display: inline-block;
  margin: 0 0 14px;
}

.page-faq .faq-hero__lead h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 5.6vw, 62px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: .01em;
  color: var(--white);
}

.page-faq .faq-hero__lead .lede {
  margin: 0 0 20px;
  max-width: 48ch;
  color: var(--mist);
  font-size: clamp(15.5px, 1.1vw, 18px);
  line-height: 1.8;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

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

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

.page-faq .faq-hero__figure .figure__media {
  border: var(--faq-edge) solid var(--line);
  box-shadow: var(--shadow);
  background: linear-gradient(140deg, var(--panel) 0%, var(--sea-deep) 100%);
}

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

/* ---------- 三步流程 ---------- */
.page-faq .faq-flow {
  background: linear-gradient(155deg, var(--panel) 0%, var(--sea-deep) 80%);
  border-top: var(--faq-edge) solid var(--line);
  border-bottom: var(--faq-edge) solid var(--line);
  padding-block: clamp(28px, 4.6vw, 56px);
}

.page-faq .faq-flow__head {
  max-width: 60ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-flow__head h2 {
  margin: 0 0 10px;
  font-size: clamp(23px, 3.2vw, 38px);
  font-weight: 400;
  line-height: 1.24;
  color: var(--white);
}

.page-faq .faq-flow__head p {
  margin: 0;
  color: var(--mist);
  line-height: 1.78;
}

.page-faq .faq-flow__track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: calc(var(--faq-gap) + 6px);
}

.page-faq .faq-step {
  position: relative;
  overflow: hidden;
  padding: calc(var(--faq-gap) + 8px) var(--faq-gap) var(--faq-gap);
  background: rgba(4, 20, 40, .74);
  border: var(--faq-edge) solid var(--line);
  box-shadow: var(--shadow);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 32%, var(--orange) 32%, var(--orange) 100%);
}

.page-faq .faq-step__num {
  display: inline-block;
  margin-bottom: 14px;
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--orange);
  border: var(--faq-edge) solid var(--orange);
}

.page-faq .faq-step__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 1.6vw, 21px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

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

.page-faq .faq-step__done {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(127, 166, 201, .38);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cyan);
}

/* ---------- 正文双列 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  padding-block: clamp(30px, 5vw, 68px);
}

.page-faq .faq-topics {
  border-left: var(--faq-edge) solid var(--line);
  padding-left: 16px;
}

.page-faq .faq-topics__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-faq .faq-topics__link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s ease, border-color .25s ease;
}

.page-faq .faq-topics__link:hover,
.page-faq .faq-topics__link:focus-visible,
.page-faq .faq-topics__link.is-visible,
.page-faq .faq-topics__link[aria-current] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 问答块 ---------- */
.page-faq .faq-block + .faq-block {
  margin-top: clamp(30px, 4.2vw, 56px);
}

.page-faq .faq-block__head {
  margin-bottom: 18px;
}

.page-faq .faq-block__head h2 {
  margin: 8px 0 0;
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 400;
  line-height: 1.28;
  color: var(--white);
}

.page-faq .faq-block__split {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-caps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .faq-cap {
  padding: 14px 16px;
  background: var(--panel);
  border: var(--faq-edge) solid var(--line);
  box-shadow: var(--shadow);
}

.page-faq .faq-cap__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-cap__unit {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

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

.page-faq .faq-block__figure .figure__media {
  border: var(--faq-edge) solid var(--line);
  box-shadow: var(--shadow);
  background: var(--panel-2);
}

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

.page-faq .qa {
  margin: 0 0 12px;
  background: var(--cream);
  border: var(--faq-edge) solid var(--ink);
  box-shadow: var(--shadow-soft);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--orange);
}

.page-faq .qa[open] summary::after {
  content: "\2212";
}

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

.page-faq .qa__answer {
  margin: 0;
  padding: 0 16px 4px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.74;
  color: var(--ink);
}

.page-faq .qa__body {
  margin: 12px 16px 16px;
  padding-top: 12px;
  border-top: 1px dashed rgba(34, 24, 19, .3);
}

.page-faq .qa__list {
  margin: 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--faq-ink-soft);
}

.page-faq .qa__list li + li {
  margin-top: 6px;
}

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

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

.page-faq .qa__steps li {
  position: relative;
  padding-left: 36px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .qa__steps li + li {
  margin-top: 9px;
}

.page-faq .qa__steps li::before {
  content: attr(data-step);
  position: absolute;
  left: 0;
  top: 2px;
  padding: 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  border: var(--faq-edge) solid var(--orange);
}

/* ---------- 延伸阅读 ---------- */
.page-faq .faq-more {
  border-top: var(--faq-edge) solid var(--line);
  background: linear-gradient(200deg, var(--sea) 0%, var(--sea-deep) 100%);
  padding-block: clamp(28px, 4.6vw, 56px);
}

.page-faq .faq-more h2 {
  margin: 0 0 20px;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 400;
  color: var(--white);
}

.page-faq .faq-more__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-faq .faq-link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  text-decoration: none;
  background: rgba(10, 38, 71, .82);
  border: var(--faq-edge) solid var(--line);
  box-shadow: var(--shadow);
  transition: transform .25s ease, border-color .25s ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
}

.page-faq .faq-link__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-faq .faq-link__title {
  font-size: 16px;
  line-height: 1.6;
  color: var(--white);
}

.page-faq .faq-link__go {
  margin-top: auto;
  font-size: 13px;
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-more__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-flow__track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--faq-gap);
  }

  .page-faq .faq-block__split {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, .72fr);
    align-items: start;
  }

  .page-faq .faq-more__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-body {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-topics {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-topics__list {
    flex-direction: column;
    gap: 10px;
  }
}

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

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