.page-faq {
  --faq-gap: clamp(20px, 3.4vw, 40px);
  --faq-line: rgba(28, 49, 72, .9);
  --faq-rule: 1px solid var(--ink-700);
  color: var(--warm-beige);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq > .shell {
  padding-top: clamp(14px, 2.2vw, 26px);
}

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

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(159, 176, 192, .45);
}

.page-faq .breadcrumb-link {
  color: var(--grey-mist);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .breadcrumb-link:hover {
  color: var(--signal-orange);
}

.page-faq .breadcrumb-current {
  color: var(--terminal-green);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(20px, 3.6vw, 40px) 0 clamp(22px, 3.4vw, 38px);
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
}

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

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  max-width: 20ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--paper);
}

.page-faq .lede {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--grey-mist);
}

.page-faq .faq-hero-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(22px, 3.4vw, 34px);
  border-top: var(--faq-rule);
  border-left: var(--faq-rule);
}

.page-faq .meta-cell {
  padding: 12px 14px 14px;
  border-right: var(--faq-rule);
  border-bottom: var(--faq-rule);
  background-image: linear-gradient(180deg, rgba(28, 49, 72, .22), rgba(28, 49, 72, 0));
}

.page-faq .meta-k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--grey-mist);
}

.page-faq .meta-v {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--warm-beige);
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(26px, 4vw, 48px);
}

/* ---------- 步骤索引 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .rail-title {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--grey-mist);
}

.page-faq .rail-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .rail-list::-webkit-scrollbar {
  display: none;
}

.page-faq .rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--ink-700);
  color: var(--grey-mist);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  color: var(--warm-beige);
  border-color: var(--signal-orange);
  background-color: rgba(255, 122, 26, .07);
}

.page-faq .rail-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--terminal-green);
}

.page-faq .rail-note {
  margin: 14px 0 12px;
  max-width: 32ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey-mist);
}

.page-faq .rail-cta {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(255, 122, 26, .45);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal-orange);
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .rail-cta:hover {
  color: var(--focus-ring);
  border-bottom-color: var(--signal-orange);
}

/* ---------- 正文列与章节 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-section {
  margin-top: clamp(30px, 4.5vw, 52px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: var(--faq-rule);
  scroll-margin-top: 100px;
}

.page-faq .faq-body > .faq-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2vw, 22px);
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-faq .faq-step {
  flex: none;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: .9;
  letter-spacing: -.04em;
  color: rgba(46, 230, 168, .1);
  -webkit-text-stroke: 1px rgba(46, 230, 168, .55);
}

.page-faq .faq-section-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 2.5vw, 28px);
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-faq .faq-section-note {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey-mist);
}

/* ---------- 图片位 ---------- */
.page-faq .media-frame {
  margin: 0;
  border: 1px solid var(--ink-700);
  background-color: var(--deep-ink-800);
  overflow: hidden;
}

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

.page-faq .media-caption {
  display: block;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--ink-700);
  background-color: rgba(11, 22, 34, .6);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--grey-mist);
}

.page-faq .faq-banner {
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-faq .faq-section .media-frame {
  margin-top: clamp(16px, 2.4vw, 22px);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .accordion {
  margin-top: clamp(16px, 2.4vw, 22px);
  border-top: var(--faq-rule);
}

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

.page-faq .accordion-trigger {
  display: flex;
  align-items: baseline;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--warm-beige);
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

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

.page-faq .accordion-trigger::marker {
  content: "";
}

.page-faq .accordion-trigger::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--terminal-green);
  transition: color .2s var(--ease);
}

.page-faq .accordion-trigger:hover,
.page-faq .accordion-trigger:focus-visible {
  color: var(--signal-orange);
  background-color: rgba(255, 122, 26, .05);
}

.page-faq .accordion-item[open] > .accordion-trigger {
  color: var(--paper);
}

.page-faq .accordion-item[open] > .accordion-trigger::after {
  content: "–";
  color: var(--signal-orange);
}

.page-faq .q-num {
  flex: none;
  min-width: 1.8em;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--terminal-green);
}

.page-faq .accordion-panel {
  padding: 0 2px 20px 2.6em;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey-mist);
}

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

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

.page-faq .accordion-panel a {
  color: var(--signal-orange);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .2s var(--ease);
}

.page-faq .accordion-panel a:hover {
  color: var(--focus-ring);
}

/* ---------- 去向卡片 ---------- */
.page-faq .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 22px);
}

.page-faq .next-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--ink-700);
  background-color: rgba(18, 34, 51, .5);
  text-decoration: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .next-card:hover,
.page-faq .next-card:focus-visible {
  border-color: var(--signal-orange);
  background-color: rgba(255, 122, 26, .07);
}

.page-faq .next-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--terminal-green);
}

.page-faq .next-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .next-desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--grey-mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail-inner {
    position: sticky;
    top: 96px;
  }

  .page-faq .rail-list {
    display: block;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .rail-list .rail-item + .rail-item {
    margin-top: 2px;
  }

  .page-faq .rail-link {
    border: none;
    border-left: 2px solid transparent;
    padding: 9px 10px;
    white-space: normal;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-section-head {
    gap: 12px;
  }

  .page-faq .faq-step {
    font-size: 28px;
  }

  .page-faq .accordion-trigger {
    font-size: 15px;
  }

  .page-faq .accordion-panel {
    padding-left: 0;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero-meta {
    grid-template-columns: minmax(0, 1fr);
  }
}