.page-faq {
  --faq-line: rgba(14, 58, 92, 0.14);
  --faq-line-strong: rgba(14, 58, 92, 0.32);
  --faq-cream: rgba(248, 242, 231, 0.8);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) 0 clamp(44px, 7vw, 80px);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg, var(--faq-line) 0 1px, transparent 1px 58px),
    repeating-linear-gradient(90deg, var(--faq-line) 0 1px, transparent 1px 58px);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-hero__window {
  background: rgba(255, 255, 255, 0.68);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-hero__body {
  padding: clamp(22px, 4vw, 44px);
}

.page-faq .faq-hero__body .eyebrow {
  color: var(--coral);
}

.page-faq .faq-hero__body h1 {
  margin: 10px 0 0;
  max-width: 22ch;
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--blue-deep);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--muted);
}

.page-faq .faq-hero__meta .mono {
  margin-right: 6px;
  font-weight: 700;
  color: var(--blue-deep);
}

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

.page-faq .faq-hero__actions .btn {
  transition: transform 150ms ease, background-color 150ms ease, color 150ms ease;
}

.page-faq .faq-hero__actions .btn:hover,
.page-faq .faq-hero__actions .btn:focus-visible {
  transform: translateY(-2px);
}

/* ---------- 分组导航 ---------- */
.page-faq .faq-directory {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 6vw, 62px) 0;
  background: var(--blue-deep);
  color: var(--paper);
}

.page-faq .faq-directory__texture {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  pointer-events: none;
}

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

.page-faq .faq-directory__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-directory .eyebrow {
  color: var(--green);
}

.page-faq .faq-directory__intro h2 {
  margin: 8px 0 0;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-directory__hint {
  margin: 10px 0 0;
  font-size: 15px;
  color: rgba(248, 242, 231, 0.72);
}

.page-faq .faq-directory__nav {
  margin-top: 26px;
}

.page-faq .faq-directory .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-directory .chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border: 1px solid rgba(248, 242, 231, 0.38);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--paper);
  font-size: 14.5px;
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.page-faq .faq-directory .chip .mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sand);
}

.page-faq .faq-directory .chip:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: var(--coral);
  transform: translateY(-2px);
}

.page-faq .faq-directory .chip:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  background: rgba(255, 255, 255, 0.16);
  border-color: var(--coral);
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-stream {
  padding: clamp(46px, 7vw, 84px) 0;
  background: var(--paper);
}

.page-faq .faq-stream .section__head {
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-stream .section__head .eyebrow {
  color: var(--coral);
}

.page-faq .faq-stream .section__head h2 {
  margin: 8px 0 0;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -0.01em;
  color: var(--blue-deep);
}

.page-faq .faq-group {
  scroll-margin-top: 100px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 4px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--faq-line-strong);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--blue-deep);
}

.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--coral);
}

.page-faq .faq-item {
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  transition: color 150ms ease;
}

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

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

.page-faq .faq-item__num {
  flex: none;
  padding-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--coral);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--blue-deep);
  transition: transform 160ms ease, background-color 160ms ease;
}

.page-faq .faq-item__mark::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__q:hover {
  color: var(--blue-deep);
}

.page-faq .faq-item__q:hover .faq-item__mark::before,
.page-faq .faq-item__q:hover .faq-item__mark::after {
  background: var(--coral);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
  border-radius: 4px;
}

.page-faq .faq-item__a {
  padding: 0 2px 20px 42px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
  animation: faqFade 180ms ease both;
}

.page-faq .faq-item__a p {
  margin: 0;
}

@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-stream__fallback {
  margin: clamp(30px, 5vw, 46px) 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--green);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--paper-alt);
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-stream__fallback a {
  font-weight: 600;
  color: var(--coral-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 三步图解 ---------- */
.page-faq .faq-steps {
  padding: clamp(46px, 7vw, 82px) 0;
  background: var(--paper-alt);
}

.page-faq .faq-steps__copy .eyebrow {
  color: var(--coral);
}

.page-faq .faq-steps__copy h2 {
  margin: 8px 0 0;
  font-size: clamp(21px, 3vw, 28px);
  letter-spacing: -0.01em;
  color: var(--blue-deep);
}

.page-faq .faq-steps__copy .prose {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-steps__figure {
  margin: 22px 0 0;
}

.page-faq .faq-steps__list {
  display: grid;
  gap: 20px;
  margin: clamp(30px, 5vw, 50px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 20px;
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--coral);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: box-shadow 160ms ease, transform 160ms ease;
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 16px;
  bottom: -20px;
  width: 2px;
  height: 20px;
  background: linear-gradient(180deg, rgba(242, 100, 60, 0.7), rgba(242, 100, 60, 0));
}

.page-faq .faq-step:last-child::after {
  content: none;
}

.page-faq .faq-step__num {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-faq .faq-step__title {
  margin: 10px 0 8px;
  font-size: 17.5px;
  color: var(--blue-deep);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-support {
  position: relative;
  padding: clamp(48px, 7vw, 88px) 0;
  background-color: var(--blue-deep);
  background-image:
    radial-gradient(circle at 88% 8%, rgba(111, 199, 184, 0.22), transparent 46%),
    radial-gradient(circle at 4% 92%, rgba(242, 100, 60, 0.16), transparent 44%);
  color: var(--paper);
}

.page-faq .faq-support .eyebrow {
  color: var(--green);
}

.page-faq .faq-support h2 {
  margin: 8px 0 0;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-support .prose {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(248, 242, 231, 0.8);
}

.page-faq .faq-support__channels {
  display: grid;
  gap: 1px;
  margin: clamp(28px, 5vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
  border: 1px solid rgba(248, 242, 231, 0.24);
  border-radius: var(--radius);
  background: rgba(248, 242, 231, 0.24);
}

.page-faq .faq-support__channel {
  padding: 24px 22px;
  background: var(--blue-abyss);
}

.page-faq .faq-support__idx {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.page-faq .faq-support__channel h3 {
  margin: 10px 0 8px;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .faq-support__channel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(248, 242, 231, 0.78);
}

.page-faq .faq-support__cta {
  margin: clamp(24px, 4vw, 34px) 0 0;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-item__a {
    padding: 0 2px 18px 0;
  }

  .page-faq .faq-hero__meta {
    gap: 8px 18px;
  }

  .page-faq .faq-directory .chip {
    padding: 9px 13px;
    font-size: 14px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-steps__figure {
    margin-top: 6px;
  }

  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
  }

  .page-faq .faq-step::after {
    left: 100%;
    bottom: auto;
    top: 50%;
    width: 26px;
    height: 2px;
    background: linear-gradient(90deg, rgba(242, 100, 60, 0.7), rgba(242, 100, 60, 0));
  }

  .page-faq .faq-support__channels {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-directory .chip:hover,
  .page-faq .faq-hero__actions .btn:hover {
    transform: none;
  }
}