.page-faq {
  --faq-line: rgba(244, 247, 250, 0.14);
  --faq-line-ink: rgba(18, 26, 36, 0.12);
  --faq-rail: 264px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(24px, 3.5vw, 48px) clamp(32px, 5vw, 72px);
}

.page-faq .breadcrumb {
  margin: 0 0 clamp(24px, 3vw, 44px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(24px, 3vw, 48px);
  align-items: end;
}

.page-faq .faq-hero-copy .section-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--haze-400);
}

.page-faq .faq-hero-copy h1 {
  margin: 0 0 20px;
  font-size: clamp(30px, 5.4vw, 68px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--board-050);
  max-width: 17ch;
}

.page-faq .faq-hero-lead {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--haze-400);
  max-width: 46ch;
}

.page-faq .faq-hero-media {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(150deg, var(--route-700), var(--abyss-950));
}

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

/* ---------- 四个任务入口 ---------- */
.page-faq .faq-tasks {
  list-style: none;
  margin: clamp(34px, 4.5vw, 64px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-task {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-task a {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(16px, 2vw, 24px) clamp(12px, 1.4vw, 20px);
  border-left: 2px solid transparent;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--t-base) var(--ease),
    background-color var(--t-base) var(--ease),
    transform var(--t-base) var(--ease);
}

.page-faq .faq-task a:hover,
.page-faq .faq-task a:focus-visible {
  border-left-color: var(--electron-400);
  background: var(--glass-100);
  transform: translateY(-2px);
}

.page-faq .faq-task-no {
  font-size: clamp(26px, 2.8vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal-500);
}

.page-faq .faq-task-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--board-050);
}

.page-faq .faq-task-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--haze-400);
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  padding-block: clamp(36px, 5vw, 80px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

/* ---------- 侧栏索引 ---------- */
.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--haze-400);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
  border-top: 1px solid var(--faq-line-ink);
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 11px 0 11px 11px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-800);
  text-decoration: none;
  transition: border-color var(--t-base) var(--ease),
    color var(--t-base) var(--ease),
    background-color var(--t-base) var(--ease);
}

.page-faq .faq-index-link .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--haze-400);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  border-left-color: var(--signal-500);
  background: rgba(27, 58, 107, 0.05);
  color: var(--route-700);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 5vw, 64px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--faq-line-ink);
}

.page-faq .faq-group-head {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.page-faq .faq-group-no {
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--signal-500);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-size: clamp(23px, 2.8vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink-800);
}

.page-faq .faq-group-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel-600);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-group {
  counter-reset: qa;
}

.page-faq .qa-list {
  display: flex;
  flex-direction: column;
}

.page-faq .qa {
  counter-increment: qa;
  border-top: 1px solid var(--faq-line-ink);
  border-left: 2px solid transparent;
  transition: border-color var(--t-base) var(--ease),
    background-color var(--t-base) var(--ease);
}

.page-faq .qa:last-child {
  border-bottom: 1px solid var(--faq-line-ink);
}

.page-faq .qa[open] {
  border-left-color: var(--electron-400);
  background: rgba(27, 58, 107, 0.045);
}

.page-faq .qa summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 42px 17px 13px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink-800);
}

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

.page-faq .qa summary::before {
  content: counter(qa, decimal-leading-zero);
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--haze-400);
}

.page-faq .qa summary::after {
  content: "+";
  position: absolute;
  top: 17px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.3;
  color: var(--signal-500);
}

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

.page-faq .qa summary:focus-visible {
  outline: none;
  box-shadow: inset var(--focus);
}

.page-faq .qa-body {
  padding: 0 42px 20px 55px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--steel-600);
}

.page-faq .qa-body a,
.page-faq .faq-ticket-note a,
.page-faq .faq-ticket-steps a {
  color: var(--route-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-body a:hover,
.page-faq .faq-ticket-note a:hover,
.page-faq .faq-ticket-steps a:hover {
  color: var(--signal-600);
}

/* ---------- 步骤列表 ---------- */
.page-faq .qa-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .qa-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel-600);
}

.page-faq .qa-steps .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal-500);
}

.page-faq .faq-record-steps {
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--faq-line-ink);
}

/* ---------- 记录插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 24px;
  border: 1px solid var(--faq-line-ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--abyss-950);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--haze-400);
}

/* ---------- 版本工具条 ---------- */
.page-faq .faq-version-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  margin-bottom: 22px;
  border: 1px solid var(--faq-line-ink);
  border-left: 2px solid var(--signal-500);
  border-radius: var(--radius);
  background: rgba(27, 58, 107, 0.05);
}

.page-faq .faq-version-hint {
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel-600);
}

/* ---------- 工单收尾 ---------- */
.page-faq .faq-group.faq-ticket {
  margin-top: clamp(36px, 5vw, 64px);
  padding: clamp(22px, 3vw, 40px);
  border-top: 0;
  border-left: 2px solid var(--signal-500);
  border-radius: var(--radius);
  background: var(--graphite-900);
}

.page-faq .faq-ticket .faq-group-no {
  color: var(--signal-500);
}

.page-faq .faq-ticket .faq-group-head h2 {
  color: var(--board-050);
}

.page-faq .faq-ticket .faq-group-lead {
  color: var(--haze-400);
}

.page-faq .faq-ticket-steps {
  margin-bottom: 20px;
}

.page-faq .faq-ticket-steps li {
  color: var(--haze-400);
}

.page-faq .faq-ticket-steps a {
  color: var(--electron-400);
}

.page-faq .faq-ticket-note {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--faq-line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-faq .faq-ticket-note a {
  color: var(--electron-400);
}

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

  .page-faq .faq-task:nth-child(odd) a {
    padding-right: 28px;
  }

  .page-faq .faq-task:nth-child(even) a {
    padding-left: 28px;
  }

  .page-faq .qa summary {
    font-size: 17px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-hero-media img {
    aspect-ratio: 14 / 8;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-tasks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-task a {
    padding-inline: 18px;
    min-height: 168px;
  }

  .page-faq .faq-task:nth-child(odd) a,
  .page-faq .faq-task:nth-child(even) a {
    padding-inline: 18px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 32px;
  }

  .page-faq .faq-index-list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .page-faq .faq-index-link {
    font-size: 14.5px;
    padding-block: 12px;
  }

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

@media (min-width: 1280px) {
  .page-faq .qa summary {
    padding-block: 19px;
  }

  .page-faq .qa summary::after {
    top: 19px;
  }
}

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

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