.page-faq {
  background: var(--ink-950);
  color: var(--text-high);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .faq-top {
  padding: 28px 0 56px;
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-muted);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-700);
}

.page-faq .crumbs a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .crumbs a:hover {
  color: var(--fox);
  border-bottom-color: var(--fox);
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--text-high);
}

.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 22px;
  padding-bottom: 36px;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--fox), var(--volt) 58%, transparent 96%);
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(34px, 5.6vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .meta-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 500;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}

.page-faq .meta-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* 阶段带 */
.page-faq .faq-stage-band {
  padding: 0 0 8px;
  border-bottom: var(--bd) solid var(--line-700);
}

.page-faq .stage-scroll {
  margin: 0 calc(var(--gutter) * -1);
  padding: 0 var(--gutter) 22px;
}

.page-faq .stage-scroll:focus-visible {
  outline: 2px solid var(--fox);
  outline-offset: 2px;
}

.page-faq .stage-track {
  display: flex;
  gap: var(--gap);
  margin: 0;
  padding: 0;
  list-style: none;
  width: max-content;
}

.page-faq .stage-item {
  display: grid;
  gap: 6px;
  width: 220px;
  padding: 18px 18px 20px;
  border: var(--bd) solid var(--line-700);
  background: var(--ink-900);
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .stage-item:hover,
.page-faq .stage-item:focus-visible {
  border-color: var(--fox);
  background: var(--ink-800);
  transform: translateY(-4px);
}

.page-faq .stage-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--volt);
}

.page-faq .stage-name {
  font-family: var(--font-section);
  font-size: 18px;
  font-weight: 600;
}

.page-faq .stage-note {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* 工具条 */
.page-faq .faq-toolbar {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin: 0 0 36px;
  padding: 16px 0;
  background: var(--ink-950);
  border-bottom: 1px solid var(--line-700);
}

.page-faq .faq-toolbar .chip-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-toolbar .chip {
  padding: 7px 14px;
  border: var(--bd) solid var(--line-700);
  background: var(--ink-900);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toolbar .chip:hover {
  color: var(--text-high);
  border-color: var(--volt);
}

.page-faq .faq-toolbar .chip[aria-pressed="true"] {
  color: var(--ink-950);
  background: var(--fox);
  border-color: var(--fox);
}

.page-faq .faq-result {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.page-faq .faq-result .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--volt);
}

/* 索引 + 答案双栏 */
.page-faq .faq-layout {
  display: grid;
  gap: 36px;
}

.page-faq .faq-index {
  padding-bottom: 8px;
}

.page-faq .faq-index .index-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.page-faq .faq-index ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 10px;
  border-left: 2px solid var(--line-700);
  color: var(--text-muted);
  font-size: 13.5px;
  line-height: 1.45;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index a .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-index a:hover {
  color: var(--text-high);
  border-left-color: var(--fox);
}

.page-faq .faq-index a[aria-current="true"],
.page-faq .faq-index a.is-active {
  color: var(--text-high);
  border-left-color: var(--volt);
  background: rgba(34, 227, 211, 0.08);
}

/* 分组 */
.page-faq .faq-group {
  margin-bottom: 52px;
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group:not(:has(.faq-item:not([hidden]))) {
  display: none;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: var(--bd) solid var(--line-700);
}

.page-faq .faq-group-idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--fox);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-section);
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 600;
  line-height: 1.25;
}

/* 问题条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-700);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--ink-900);
  box-shadow: inset 3px 0 0 var(--volt);
}

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 20px;
  gap: 12px;
  align-items: start;
  padding: 18px 14px 18px 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q-idx {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-q-text {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text-high);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item summary:hover .faq-q-text {
  color: var(--fox);
}

.page-faq .faq-q-mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: var(--text-muted);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-q-mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-q-mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-q-mark::before {
  background: var(--fox);
}

.page-faq .faq-item[open] .faq-q-mark::after {
  transform: scaleY(0);
}

.page-faq .faq-answer {
  padding: 0 20px 22px 66px;
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.75;
}

.page-faq .faq-item[open] .faq-answer {
  animation: faq-answer-in 260ms var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

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

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

.page-faq .faq-answer a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 227, 211, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-answer a:hover {
  color: var(--fox);
  border-bottom-color: var(--fox);
}

.page-faq .step-list {
  counter-reset: faq-step;
  display: grid;
  gap: 9px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-list li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.page-faq .step-list li::before {
  content: counter(faq-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--volt);
}

/* 图 */
.page-faq .faq-figure {
  margin: 28px 0 0;
  border: var(--bd) solid var(--line-700);
  background: var(--ink-900);
  box-shadow: var(--shadow-soft);
}

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

.page-faq .faq-figure .media-caption,
.page-faq .faq-contact-figure .media-caption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-muted);
  border-top: 1px solid var(--line-700);
}

/* 联系区块 */
.page-faq .faq-contact {
  margin-top: 72px;
  padding: 56px 0 64px;
  background: var(--paper-100);
  color: var(--ink-950);
  border-top: var(--bd) solid var(--ink-950);
}

.page-faq .faq-contact-grid {
  display: grid;
  gap: 36px;
}

.page-faq .faq-contact .eyebrow {
  color: var(--volt-700);
  margin-bottom: 10px;
}

.page-faq .faq-contact-main h2 {
  margin: 0 0 14px;
  font-family: var(--font-section);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--ink-950);
}

.page-faq .faq-contact-lede {
  margin: 0 0 26px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: #3A4147;
}

.page-faq .contact-list {
  display: grid;
  gap: 0;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  border-top: var(--bd) solid var(--ink-950);
}

.page-faq .contact-list .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(11, 14, 16, 0.18);
}

.page-faq .contact-list .contact-key {
  flex: 0 0 76px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: #5C646A;
}

.page-faq .contact-list .contact-value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  color: var(--ink-950);
  word-break: break-word;
}

.page-faq .contact-list .contact-value.num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.page-faq .contact-list .copy-btn {
  flex: 0 0 auto;
  padding: 4px 11px;
  border: var(--bd) solid var(--ink-950);
  background: transparent;
  color: var(--ink-950);
  font-family: var(--font-body);
  font-size: 12px;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .contact-list .copy-btn:hover {
  background: var(--ink-950);
  color: var(--paper-100);
}

.page-faq .contact-list .copy-btn[data-copied="true"] {
  background: var(--lime);
  border-color: var(--ink-950);
  color: var(--ink-950);
}

.page-faq .faq-contact .btn-paper {
  display: inline-block;
  padding: 13px 26px;
  border: var(--bd) solid var(--ink-950);
  background: var(--fox);
  color: var(--paper-100);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-contact .btn-paper:hover {
  background: var(--fox-600);
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 rgba(11, 14, 16, 0.6);
}

.page-faq .faq-contact-figure {
  margin: 0;
  align-self: start;
  border: var(--bd) solid var(--ink-950);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-contact-figure .media-caption {
  color: #5C646A;
  border-top-color: rgba(11, 14, 16, 0.2);
  background: var(--paper-200);
}

@media (min-width: 720px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-figure {
    margin-top: 32px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    align-self: start;
  }

  .page-faq .faq-index ol {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .page-faq .faq-index a {
    padding: 10px 12px;
    font-size: 14px;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero h1 {
    font-size: clamp(44px, 5.4vw, 74px);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item summary {
    grid-template-columns: 34px minmax(0, 1fr) 18px;
    gap: 8px;
    padding: 16px 10px 16px 8px;
  }

  .page-faq .faq-q-text {
    font-size: 15px;
  }

  .page-faq .faq-answer {
    padding: 0 12px 20px 12px;
  }

  .page-faq .faq-hero-meta {
    gap: 16px 28px;
  }

  .page-faq .meta-num {
    font-size: 22px;
  }

  .page-faq .faq-index ol {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-toolbar {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-answer {
    animation: none;
  }

  .page-faq .stage-item,
  .page-faq .faq-contact .btn-paper {
    transition: none;
  }

  .page-faq .stage-item:hover,
  .page-faq .faq-contact .btn-paper:hover {
    transform: none;
  }
}