.page-faq {
  --faq-shadow: 0 18px 42px rgba(0, 0, 0, 0.42);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-ui);
  padding-bottom: clamp(56px, 9vw, 110px);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 64px) 0 clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(620px, 84vw);
  height: min(620px, 84vw);
  background: radial-gradient(circle at 55% 45%,
      rgba(139, 92, 246, 0.32),
      rgba(34, 211, 238, 0.12) 44%,
      transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
  font-size: 13px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .lede {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--mist);
}

/* ===== 二十秒刻度尺 ===== */
.page-faq .ruler {
  position: relative;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: clamp(18px, 2.6vw, 26px) clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(21, 26, 35, 0.96), rgba(11, 14, 20, 0.9));
  box-shadow: var(--faq-shadow);
  overflow: hidden;
}

.page-faq .ruler::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--violet), var(--cyan));
}

.page-faq .ruler figcaption {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-faq .ruler__bar {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 16px;
}

.page-faq .ruler__bar::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg,
      rgba(34, 211, 238, 0.75),
      rgba(139, 92, 246, 0.75) 62%,
      var(--amber));
}

.page-faq .ruler__tick {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding-bottom: 10px;
}

.page-faq .ruler__tick::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  width: 1px;
  height: 12px;
  background: var(--line);
  transform: translateX(-50%);
}

.page-faq .ruler__tick b {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .ruler__tick--edge,
.page-faq .ruler__tick--edge b {
  color: var(--amber);
}

.page-faq .ruler__tick--edge::after {
  bottom: -8px;
  height: 16px;
  background: var(--amber);
}

.page-faq .ruler__note {
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  padding-left: 14px;
  max-width: 62ch;
  border-left: 2px solid var(--amber);
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ===== 两栏骨架 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
  padding-top: clamp(26px, 4vw, 48px);
}

.page-faq .faq-index {
  padding: clamp(18px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(21, 26, 35, 0.72);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-index__list a {
  display: block;
  padding: 10px 12px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(34, 211, 238, 0.07);
  color: var(--paper);
}

.page-faq .faq-index__note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-index__note-num {
  margin: 0 0 6px;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-faq .faq-index__note p:last-child {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--mist);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  min-width: 0;
}

/* ===== 章节画板 ===== */
.page-faq .faq-block {
  position: relative;
  scroll-margin-top: 96px;
  overflow: hidden;
}

.page-faq .faq-block::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--violet), rgba(139, 92, 246, 0) 72%);
  opacity: 0.6;
}

.page-faq .faq-block .section-title {
  margin: 8px 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-block p {
  max-width: 68ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-block p a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-block p a:hover,
.page-faq .faq-block p a:focus-visible {
  color: var(--paper);
}

/* ===== 折叠问答 ===== */
.page-faq .faq-block details {
  border-top: 1px solid var(--line);
}

.page-faq .faq-block details:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-block summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.16s ease;
}

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

.page-faq .faq-block summary:hover {
  color: var(--cyan);
}

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

.page-faq .faq-block summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-faq .faq-block details > p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ===== 记录核对情形 ===== */
.page-faq .case-list {
  list-style: none;
  margin: 6px 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .case-list > li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(11, 14, 20, 0.52);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-faq .case-list > li:hover {
  border-color: rgba(139, 92, 246, 0.5);
  transform: translateY(-2px);
}

.page-faq .case-list h3 {
  margin: 10px 0 8px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.42;
  color: var(--paper);
}

.page-faq .faq-block .case-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
}

/* ===== 图片 ===== */
.page-faq .faq-figure {
  margin: clamp(18px, 2.6vw, 26px) 0;
}

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

/* ===== 自查清单 ===== */
.page-faq .checklist {
  list-style: none;
  margin: 6px 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .check-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(11, 14, 20, 0.45);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .check-item:hover {
  border-color: rgba(34, 211, 238, 0.45);
}

.page-faq .check-item input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.page-faq .check-item input:checked {
  background: var(--moss);
  border-color: var(--moss);
  box-shadow: inset 0 0 0 3px var(--ink);
}

.page-faq .check-item input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .check-item__body {
  display: block;
  min-width: 0;
}

.page-faq .check-item__name {
  display: block;
  margin-bottom: 6px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .check-item__desc {
  display: block;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

/* ===== 工单准备清单 ===== */
.page-faq .ticket-need {
  display: grid;
  gap: 1px;
  margin: 6px 0 22px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--line);
  overflow: hidden;
}

.page-faq .ticket-need > div {
  display: grid;
  gap: 5px;
  padding: 15px 18px;
  background: rgba(11, 14, 20, 0.62);
}

.page-faq .ticket-need dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .ticket-need dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .ticket-label {
  margin-bottom: 12px;
}

.page-faq .cat-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .cat-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 12px 16px;
  border-left: 2px solid var(--violet);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(21, 26, 35, 0.72);
}

.page-faq .cat-list__key {
  flex: 0 0 auto;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .cat-list__val {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-cta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin: 0;
}

.page-faq .faq-cta-line span {
  font-size: 14px;
  line-height: 1.68;
  color: var(--mist);
}

/* ===== 响应式 ===== */
@media (min-width: 620px) {
  .page-faq .ticket-need > div {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(220px, 272px) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

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

  .page-faq .faq-block {
    border-radius: var(--radius-lg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .case-list > li,
  .page-faq .check-item,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .case-list > li:hover {
    transform: none;
  }
}