.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 30px);
  --faq-card: var(--paper-card);
  --faq-capsule: var(--green);
  --faq-line: var(--line);
  --faq-sec-pad: clamp(46px, 7vw, 92px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
  padding-bottom: clamp(40px, 6vw, 72px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(20px, 3vw, 30px) var(--gutter) 0;
}
.page-faq .breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-soft);
}
.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--mist);
}
.page-faq .breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .breadcrumbs a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}
.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(30px, 5vw, 64px) var(--gutter) clamp(24px, 4vw, 40px);
}
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
}
.page-faq .faq-hero__lead .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ember);
  margin: 0;
}
.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 68px);
  line-height: 1.02;
  letter-spacing: -.025em;
  margin: 14px 0 0;
  max-width: 15ch;
}
.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 38ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 章节预览 ---------- */
.page-faq .faq-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-toc li {
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-toc a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 2px;
  color: inherit;
  text-decoration: none;
  font-size: 15px;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-toc a:hover {
  color: var(--ember);
  transform: translateX(5px);
}
.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--orange);
  min-width: 22px;
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-sec {
  padding-block: var(--faq-sec-pad);
}
.page-faq .faq-sec > .container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.page-faq .faq-sec--dark {
  --faq-capsule: var(--green-card);
  --faq-line: var(--line-dark);
  background: var(--green);
  color: var(--paper-card);
}
.page-faq .faq-sec--dark .qa-item > summary {
  box-shadow: inset 0 0 0 1px var(--line-dark);
}
.page-faq .faq-sec--help {
  background: var(--navy);
  color: var(--paper-card);
  border-radius: var(--r-xl) var(--r-xl) 0 0;
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: clamp(24px, 4vw, 44px);
}
.page-faq .faq-head__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(52px, 12vw, 104px);
  line-height: .82;
  letter-spacing: -.035em;
  color: var(--orange);
}
.page-faq .faq-sec--dark .faq-head__num {
  color: var(--lime);
}
.page-faq .faq-head__text h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -.015em;
  margin: 0;
}
.page-faq .faq-head__text p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-faq .faq-sec--dark .faq-head__text p {
  color: var(--mist);
}
.page-faq .link {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .link:hover {
  color: var(--orange);
}

/* ---------- 图片容器 ---------- */
.page-faq .media {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--navy);
}
.page-faq .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .media__cap {
  display: block;
  padding: 12px 20px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--mist);
  background: var(--navy);
}
.page-faq .step-map {
  margin-bottom: clamp(24px, 4vw, 42px);
}

/* ---------- 三步走卡片 ---------- */
.page-faq .step-cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}
.page-faq .step-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 3vw, 30px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .step-card:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
}
.page-faq .step-card__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: var(--pill);
  background: var(--green);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
}
.page-faq .step-card h3 {
  margin: 4px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}
.page-faq .step-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-faq .step-card__check {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  color: var(--ink);
}
.page-faq .step-card__check-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--orange);
  margin-bottom: 5px;
}

/* ---------- 可展开问答组 ---------- */
.page-faq .qa-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-faq .qa-item {
  border-radius: var(--r-md);
}
.page-faq .qa-item > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 22px;
  border-radius: var(--pill);
  background: var(--faq-capsule);
  color: var(--paper-card);
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .qa-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .qa-item > summary:hover {
  transform: translateY(-2px);
}
.page-faq .qa-item > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}
.page-faq .qa-item > summary h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0;
}
.page-faq .qa-item__icon {
  flex: none;
  position: relative;
  width: 22px;
  height: 22px;
  border-radius: var(--pill);
  border: 1px solid currentColor;
  opacity: .72;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.page-faq .qa-item__icon::before,
.page-faq .qa-item__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1.5px;
  background: currentColor;
  transform: translate(-50%, -50%);
}
.page-faq .qa-item__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.page-faq .qa-item[open] > summary {
  border-bottom-left-radius: var(--r-sm);
  border-bottom-right-radius: var(--r-sm);
}
.page-faq .qa-item[open] .qa-item__icon {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--green);
  opacity: 1;
}
.page-faq .qa-item[open] .qa-item__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}
.page-faq .qa-item__body {
  margin-top: 10px;
  padding: 18px 22px 20px;
  background: var(--faq-card);
  color: var(--ink);
  border-radius: var(--r-md);
  border-left: 4px solid var(--lime);
  font-size: 15px;
  line-height: 1.78;
}
.page-faq .qa-item__body p {
  margin: 0;
}
.page-faq .qa-item__body p + p {
  margin-top: 10px;
  color: var(--ink-soft);
}
.page-faq .qa-item__do {
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 术语索引 ---------- */
.page-faq .term-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}
.page-faq .term-table-wrap {
  overflow-x: auto;
  border-radius: var(--r-lg);
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 8px 6px 2px;
}
.page-faq .term-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.page-faq .term-table__caption {
  caption-side: top;
  text-align: left;
  padding: 10px 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.page-faq .term-table th[scope="col"] {
  text-align: left;
  padding: 0 12px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--ink);
  font-weight: 500;
}
.page-faq .term-table td,
.page-faq .term-table th[scope="row"] {
  padding: 12px;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.7;
  vertical-align: baseline;
  text-align: left;
}
.page-faq .term-table tbody tr:last-child td,
.page-faq .term-table tbody tr:last-child th[scope="row"] {
  border-bottom: none;
}
.page-faq .term-table tbody tr:nth-child(even) td,
.page-faq .term-table tbody tr:nth-child(even) th[scope="row"] {
  background: rgba(28, 23, 18, .03);
}
.page-faq .term-table__key {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
  width: 6.5em;
}
.page-faq .term-table td {
  color: var(--ink-soft);
}
.page-faq .term-media {
  margin: 0;
}

/* ---------- 收尾求助 ---------- */
.page-faq .help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
}
.page-faq .help-grid__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(48px, 10vw, 92px);
  line-height: .84;
  letter-spacing: -.035em;
  color: var(--orange);
}
.page-faq .help-grid__lead h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.14;
  letter-spacing: -.015em;
  margin: 16px 0 0;
  max-width: 20ch;
}
.page-faq .help-grid__lead p {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}
.page-faq .help-grid__lead .btn {
  margin-top: 24px;
}
.page-faq .btn--pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: var(--pill);
  background: var(--orange);
  color: #1C1712;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .btn--pill:hover {
  background: var(--lime);
  transform: translateY(-3px);
}

.page-faq .help-grid__panel {
  background: var(--green);
  border: 1px solid var(--line-dark);
  border-radius: var(--r-lg);
  padding: clamp(20px, 3vw, 30px);
}
.page-faq .help-grid__panel h3 {
  margin: 0 0 16px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper-card);
}
.page-faq .help-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .help-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}
.page-faq .help-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}
.page-faq .help-list__kw {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--lime);
}

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

@media (min-width: 760px) {
  .page-faq .faq-head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: clamp(16px, 3vw, 34px);
    align-items: start;
  }
  .page-faq .faq-head__num {
    font-size: clamp(72px, 9vw, 104px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }
  .page-faq .step-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .help-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .term-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }
  .page-faq .term-layout .term-media {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
}

@media (max-width: 480px) {
  .page-faq .qa-item > summary {
    padding: 13px 18px;
    align-items: flex-start;
  }
  .page-faq .qa-item > summary h3 {
    font-size: 15px;
  }
  .page-faq .qa-item__body {
    padding: 16px 16px 18px;
    font-size: 14.5px;
  }
  .page-faq .term-table__key {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-card,
  .page-faq .qa-item > summary,
  .page-faq .btn--pill,
  .page-faq .faq-toc a {
    transition: none;
  }
  .page-faq .step-card:hover,
  .page-faq .qa-item > summary:hover,
  .page-faq .btn--pill:hover,
  .page-faq .faq-toc a:hover {
    transform: none;
  }
}