.page-faq {
  --faq-rule: 1px solid var(--line);
  --faq-pad: clamp(22px, 3.4vw, 40px);
  --faq-anchor-gap: calc(var(--bar-h) + 28px);
  display: block;
  background:
    radial-gradient(120% 60% at 8% 0%, rgba(31, 143, 191, 0.14), transparent 62%),
    linear-gradient(180deg, var(--c-sky) 0%, var(--c-ink) 100%);
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 34px) 0 clamp(34px, 5vw, 64px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(80% 66% at 4% 4%, rgba(31, 143, 191, 0.26), transparent 64%),
    radial-gradient(66% 58% at 98% 2%, rgba(75, 59, 122, 0.42), transparent 68%);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6.2vw, 4rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--tx-1);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 54ch;
  color: var(--tx-2);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.8;
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--tx-2);
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-jump a::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-lake);
}

.page-faq .faq-jump a:hover {
  color: var(--tx-1);
  border-color: var(--c-lake);
  background: rgba(31, 143, 191, 0.16);
  transform: translateY(-2px);
}

.page-faq .faq-jump a:focus-visible {
  outline: 2px solid var(--c-lake);
  outline-offset: 2px;
}

.page-faq .faq-hero__fig {
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: rgba(10, 26, 47, 0.55);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

.page-faq .faq-hero__fig figcaption {
  padding: 11px 18px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-lake-mist);
}

/* ---------- 通用章节 ---------- */
.page-faq .section {
  padding: clamp(38px, 5.6vw, 72px) 0;
}

.page-faq .faq-qa {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .section__head {
  max-width: 60ch;
}

.page-faq .section__title {
  margin: 12px 0 0;
  color: var(--tx-1);
  font-family: var(--font-body);
  font-size: clamp(1.45rem, 3vw, 2.125rem);
  font-weight: 700;
  line-height: 1.28;
}

.page-faq .section__lead {
  margin: 12px 0 0;
  color: var(--tx-2);
  font-size: 1rem;
  line-height: 1.8;
}

/* ---------- 三步开始 ---------- */
.page-faq .faq-start {
  border-top: var(--faq-rule);
}

.page-faq .faq-steps {
  display: grid;
  gap: 16px;
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 26px 22px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(168, 214, 232, 0.10), rgba(10, 26, 47, 0.52));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 24px;
  right: 24px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-lake), var(--c-grass) 58%, transparent);
}

.page-faq .faq-step:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-faq .faq-step__no {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-lake-mist);
}

.page-faq .faq-step h3 {
  margin: 14px 0 0;
  color: var(--tx-1);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .faq-step p {
  margin: 10px 0 0;
  color: var(--tx-2);
  font-size: 0.9375rem;
  line-height: 1.85;
}

/* ---------- 问答分组 ---------- */
.page-faq .qa-group {
  padding: clamp(28px, 4vw, 48px) 0;
  border-top: var(--faq-rule);
  scroll-margin-top: var(--faq-anchor-gap);
}

.page-faq .qa-group__head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  max-width: 68ch;
}

.page-faq .qa-group__idx {
  flex: none;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--c-data);
}

.page-faq .qa-group__title {
  margin: 0;
  color: var(--tx-1);
  font-family: var(--font-body);
  font-size: clamp(1.25rem, 2.3vw, 1.625rem);
  font-weight: 700;
  line-height: 1.35;
}

.page-faq .qa-group__desc {
  margin: 7px 0 0;
  color: var(--tx-3);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .qa-group__desc a,
.page-faq .qa__body a {
  color: var(--c-lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 143, 191, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-group__desc a:hover,
.page-faq .qa__body a:hover {
  color: var(--c-lake-mist);
  border-color: var(--c-lake-mist);
}

.page-faq .qa-group__desc a:focus-visible,
.page-faq .qa__body a:focus-visible {
  outline: 2px solid var(--c-lake);
  outline-offset: 2px;
}

.page-faq .qa-group__layout {
  display: block;
}

.page-faq .qa-figure {
  margin: 22px 0 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(10, 26, 47, 0.5);
  overflow: hidden;
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .qa-figure figcaption {
  padding: 10px 16px 13px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--tx-3);
}

/* ---------- 问题条目 ---------- */
.page-faq .qa-list {
  margin-top: 20px;
  border-top: var(--faq-rule);
}

.page-faq .qa {
  border-bottom: var(--faq-rule);
}

.page-faq .qa > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  color: var(--tx-1);
  font-size: clamp(0.95rem, 1.5vw, 1.0625rem);
  font-weight: 600;
  line-height: 1.6;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa > summary::after {
  content: "";
  flex: none;
  width: 22px;
  height: 22px;
  margin: 2px 0 0 auto;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background-color: transparent;
  background-image: linear-gradient(var(--c-lake), var(--c-lake)),
    linear-gradient(var(--c-lake), var(--c-lake));
  background-repeat: no-repeat;
  background-position: center center, center center;
  background-size: 10px 1.5px, 1.5px 10px;
  transition: transform var(--dur) var(--ease), background-size var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-faq .qa[open] > summary::after {
  background-size: 10px 1.5px, 1.5px 0;
  border-color: var(--c-lake);
  transform: rotate(180deg);
}

.page-faq .qa > summary:hover {
  color: var(--c-lake-mist);
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--c-lake);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .qa__body {
  padding: 0 0 20px;
  color: var(--tx-2);
  font-size: 0.9688rem;
  line-height: 1.85;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
}

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

.page-faq .qa__body ul {
  margin: 4px 0 12px;
  padding-left: 20px;
}

.page-faq .qa__body li {
  margin-bottom: 6px;
}

.page-faq .qa__body li::marker {
  color: var(--c-lake);
}

.page-faq .qa__body strong {
  color: var(--tx-1);
  font-weight: 600;
}

.page-faq .data {
  font-family: var(--font-mono);
  font-size: 0.875em;
  letter-spacing: 0.03em;
  color: var(--c-data);
}

/* ---------- 联络卡片 ---------- */
.page-faq .contact-plate {
  margin: 22px 0 0;
  padding: var(--faq-pad);
  border-radius: var(--radius-lg);
  background: var(--c-paper);
  color: var(--paper-tx-1);
  box-shadow: var(--shadow-card);
}

.page-faq .contact-plate__rows {
  display: grid;
  gap: 0;
}

.page-faq .contact-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(10, 26, 47, 0.12);
}

.page-faq .contact-row:first-child {
  padding-top: 0;
}

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

.page-faq .contact-row__k {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-tx-2);
}

.page-faq .contact-row__v {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper-tx-1);
  overflow-wrap: anywhere;
}

.page-faq .contact-row__v.data {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--c-lake-deep);
}

.page-faq .contact-plate__note {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px dashed rgba(10, 26, 47, 0.22);
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--paper-tx-2);
}

.page-faq .contact-plate .btn {
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .contact-row {
    grid-template-columns: minmax(0, 132px) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: clamp(30px, 4vw, 60px);
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .qa-group__layout {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(26px, 3.6vw, 52px);
    align-items: start;
    margin-top: 20px;
  }

  .page-faq .qa-group--media .qa-figure {
    margin-top: 0;
  }

  .page-faq .qa-group--media .qa-list {
    margin-top: 0;
  }
}

@media (min-width: 1180px) {
  .page-faq .contact-plate {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: clamp(24px, 3vw, 44px);
    align-items: start;
  }

  .page-faq .contact-plate__rows {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
  }

  .page-faq .contact-plate__note {
    grid-column: 2 / 3;
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .page-faq .contact-plate .btn {
    grid-column: 2 / 3;
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .faq-step,
  .page-faq .qa > summary,
  .page-faq .qa > summary::after {
    transition: none;
  }

  .page-faq .faq-jump a:hover,
  .page-faq .faq-step:hover {
    transform: none;
  }
}