.page-faq {
  --faq-line: rgba(27, 42, 74, 0.14);
  --faq-line-dark: rgba(245, 247, 250, 0.18);
  color: var(--c-text);
  font-family: var(--font-body);
  background: var(--c-snow);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

.page-faq section[id] {
  scroll-margin-top: 118px;
}

/* 面包屑 */
.page-faq .faq-crumb {
  max-width: var(--frame-max);
  margin: 0 auto;
  padding: clamp(14px, 2vw, 22px) var(--gutter) 0;
}

.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-text-soft);
}

.page-faq .faq-crumb li:not(:last-child)::after {
  content: "/";
  margin: 0 8px;
  color: var(--c-mist);
}

.page-faq .faq-crumb a {
  color: var(--c-text-soft);
  text-decoration: none;
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--c-copper);
}

/* 首屏框景 */
.page-faq .faq-hero {
  max-width: var(--frame-max);
  margin: 0 auto;
  padding: clamp(16px, 2.5vw, 26px) var(--gutter) 0;
}

.page-faq .hero-frame {
  position: relative;
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(22px, 4vw, 48px);
  background: linear-gradient(158deg, var(--c-indigo) 0%, var(--c-indigo-deep) 58%, var(--c-ink) 100%);
  border: 1px solid rgba(200, 150, 62, 0.36);
  box-shadow: 0 30px 60px -46px rgba(15, 26, 46, 0.9);
  overflow: hidden;
}

.page-faq .hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  pointer-events: none;
}

.page-faq .hero-frame::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(200, 150, 62, 0.22);
  border-radius: 50%;
  box-shadow: 0 0 0 34px rgba(200, 150, 62, 0.06), 0 0 0 68px rgba(200, 150, 62, 0.04);
  pointer-events: none;
}

.page-faq .hero-copy,
.page-faq .hero-media {
  position: relative;
  z-index: 1;
}

.page-faq .hero-copy .label {
  color: var(--c-copper);
}

.page-faq .hero-title {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 6vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-snow);
}

.page-faq .hero-lead {
  margin: 0 0 22px;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.8);
}

.page-faq .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .hero-actions .btn--ghost {
  color: var(--c-snow);
  border-color: rgba(245, 247, 250, 0.42);
}

.page-faq .hero-actions .btn--ghost:hover,
.page-faq .hero-actions .btn--ghost:focus-visible {
  border-color: var(--c-copper);
  color: var(--c-copper-lift);
}

.page-faq .hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(245, 247, 250, 0.62);
}

.page-faq .hero-media .media {
  margin: 0;
  padding: 8px;
  border: 1px solid rgba(200, 150, 62, 0.3);
  background: rgba(245, 247, 250, 0.05);
}

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

/* 三步路径 */
.page-faq .path-band {
  max-width: var(--frame-max);
  margin: clamp(30px, 4.5vw, 56px) auto 0;
  padding: 0 var(--gutter);
}

.page-faq .path-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.page-faq .path-head .label {
  color: var(--c-teal);
}

.page-faq .path-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.45;
}

.page-faq .path-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .path-step {
  padding-top: 18px;
  border-top: 2px solid var(--c-copper);
}

.page-faq .path-num {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-copper);
  border: 1px solid rgba(200, 150, 62, 0.5);
}

.page-faq .path-step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .path-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text-soft);
}

.page-faq .path-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 10px;
  border: 1px solid var(--faq-line);
  background: var(--c-paper);
}

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

.page-faq .path-figure .media-caption {
  display: block;
  margin-top: 10px;
  padding: 0 2px 2px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-text-soft);
}

/* 双栏骨架 */
.page-faq .layout {
  max-width: var(--frame-max);
  margin: clamp(36px, 5vw, 66px) auto 0;
  padding: 0 var(--gutter) clamp(52px, 8vw, 96px);
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

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

/* 左侧索引 */
.page-faq .section-nav {
  border-top: 1px solid var(--faq-line);
  padding-top: 14px;
}

.page-faq .nav-title {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-text-soft);
}

.page-faq .section-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .section-nav li {
  flex: 0 0 auto;
}

.page-faq .section-nav a {
  display: block;
  padding: 7px 12px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-text-soft);
  text-decoration: none;
  border: 1px solid var(--faq-line);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .section-nav a:hover,
.page-faq .section-nav a:focus-visible {
  color: var(--c-indigo);
  border-color: var(--c-copper);
}

.page-faq .section-nav a[aria-current="true"] {
  color: var(--c-indigo);
  border-color: var(--c-copper);
}

/* 章节 */
.page-faq .faq-section {
  margin-bottom: clamp(44px, 6vw, 78px);
}

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

.page-faq .sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding-bottom: 14px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .sec-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(21px, 2.8vw, 27px);
  line-height: 1.45;
}

.page-faq .sec-note {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-text-soft);
}

/* 分类矩阵 */
.page-faq .cat-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-faq .cat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 18px;
  background: var(--c-snow);
  border: 1px solid var(--faq-line);
}

.page-faq .cat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--c-copper);
}

.page-faq .cat-tag {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--c-text-soft);
}

.page-faq .cat h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
}

.page-faq .cat p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-text-soft);
}

.page-faq .cat a {
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 1px;
  font-size: 13px;
  color: var(--c-teal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .cat a:hover,
.page-faq .cat a:focus-visible {
  color: var(--c-copper);
}

/* 问答手风琴 */
.page-faq .qa-list {
  border-top: 1px solid var(--faq-line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
  transition: background 0.25s var(--ease);
}

.page-faq .qa[open] {
  background: rgba(237, 231, 218, 0.44);
  box-shadow: 0 16px 30px -26px rgba(15, 26, 46, 0.7);
}

.page-faq .qa > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 8px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}

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

.page-faq .qa > summary::before {
  content: "+";
  flex: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-copper);
}

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

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

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--c-copper);
  outline-offset: 2px;
}

.page-faq .qa-body {
  padding: 0 18px 20px 38px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-text-soft);
}

/* 旧版本对照清单 */
.page-faq .checklist-wrap {
  padding: clamp(16px, 2.5vw, 24px);
  border: 1px solid var(--faq-line);
  background: var(--c-snow);
}

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

.page-faq .check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 14px;
  background: var(--c-paper);
  border: 1px solid rgba(27, 42, 74, 0.12);
}

.page-faq .check-item input[type="checkbox"] {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  accent-color: var(--c-copper);
  cursor: pointer;
}

.page-faq .check-item label {
  font-size: 15px;
  line-height: 1.7;
  cursor: pointer;
}

.page-faq .check-item input[type="checkbox"]:checked + label {
  color: var(--c-text-soft);
  text-decoration: line-through;
  text-decoration-color: rgba(200, 150, 62, 0.7);
}

.page-faq .checklist-hint {
  margin: 16px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-text-soft);
}

/* 反馈准备面板 */
.page-faq .feedback-panel {
  padding: clamp(22px, 4vw, 40px);
  background: linear-gradient(160deg, var(--c-indigo) 0%, var(--c-ink) 100%);
  border-top: 2px solid var(--c-copper);
  color: var(--c-snow);
}

.page-faq .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .prep-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.page-faq .prep-idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-copper);
}

.page-faq .prep-list h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-snow);
}

.page-faq .prep-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 247, 250, 0.76);
}

.page-faq .code-inline {
  display: inline-block;
  padding: 1px 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-copper-lift);
  background: rgba(245, 247, 250, 0.08);
  border: 1px solid rgba(200, 150, 62, 0.35);
}

.page-faq .feedback-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 30px);
  padding-top: 18px;
  border-top: 1px solid var(--faq-line-dark);
}

.page-faq .feedback-foot p {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.72);
}

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

@media (min-width: 780px) {
  .page-faq .path-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 3vw, 34px);
  }

  .page-faq .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .hero-frame {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-faq .hero-media img {
    aspect-ratio: 3 / 2;
    object-fit: cover;
    height: 100%;
  }
}

@media (min-width: 1100px) {
  .page-faq .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 桌面双栏 + 固定索引 */
@media (min-width: 920px) {
  .page-faq .layout {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 62px);
  }

  .page-faq .section-nav {
    position: sticky;
    top: 108px;
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .section-nav ul {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .section-nav a {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 10px 4px 10px 16px;
    white-space: normal;
  }

  .page-faq .section-nav a:hover,
  .page-faq .section-nav a:focus-visible {
    border-left-color: var(--c-mist);
    border-bottom: 0;
  }

  .page-faq .section-nav a[aria-current="true"] {
    border-left-color: var(--c-copper);
    font-weight: 700;
    background: linear-gradient(90deg, rgba(200, 150, 62, 0.12), transparent);
  }

  .page-faq .qa > summary {
    padding: 17px 10px;
  }

  .page-faq .qa-body {
    padding: 0 30px 22px 40px;
  }
}

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