.page-faq {
  --faq-rule: 2px solid var(--line-700);
  --faq-panel: var(--ink-800);
  padding: 20px 0 72px;
  overflow-wrap: break-word;
}

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

.page-faq .breadcrumb {
  margin-bottom: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .intro {
  display: grid;
  gap: 26px;
  padding-bottom: 34px;
  border-bottom: var(--faq-rule);
}

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

.page-faq .intro__title {
  margin: 10px 0 16px;
  font-size: clamp(32px, 6.6vw, 58px);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 1.04;
}

.page-faq .intro__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-faq .intro__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .intro__quick-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  border: var(--faq-rule);
  background: var(--faq-panel);
  color: var(--paper-100);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-faq .intro__quick-link:hover,
.page-faq .intro__quick-link:focus-visible {
  border-color: var(--cyan-500);
  color: var(--cyan-500);
  box-shadow: 4px 4px 0 var(--shadow-ink);
}

.page-faq .intro__figure {
  margin: 0;
  border: var(--faq-rule);
  background: var(--faq-panel);
  box-shadow: var(--shadow-hard);
}

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

@media (min-width: 900px) {
  .page-faq .intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 40px;
  }
}

/* ---------- 通用章节头 ---------- */
.page-faq .faq-section {
  padding-top: 52px;
}

.page-faq .section-head {
  display: grid;
  gap: 8px;
  margin-bottom: 22px;
}

.page-faq .section-head .section-title {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.page-faq .section-note {
  margin: 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist-300);
}

/* ---------- 五阶段路径 ---------- */
.page-faq .stages {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .stage {
  position: relative;
  border: var(--faq-rule);
  background: var(--faq-panel);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .stage--active {
  border-color: var(--cyan-500);
  box-shadow: 6px 6px 0 var(--shadow-ink);
}

.page-faq .stage:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-500);
  box-shadow: var(--shadow-hard-lg);
}

.page-faq .stage + .stage::before {
  content: "";
  position: absolute;
  left: 26px;
  top: -16px;
  width: 2px;
  height: 16px;
  background: var(--cyan-700);
}

.page-faq .stage__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  min-height: 44px;
  padding: 16px 16px 18px;
  color: inherit;
  text-decoration: none;
}

.page-faq .stage__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-500);
}

.page-faq .stage__title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-faq .stage__goal {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-300);
}

.page-faq .stage__steps {
  display: grid;
  gap: 4px;
  margin-top: 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-100);
}

.page-faq .stage__steps > span {
  position: relative;
  display: block;
  padding-left: 14px;
}

.page-faq .stage__steps > span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--cyan-700);
}

.page-faq .stage__time {
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber-400);
}

@media (min-width: 760px) {
  .page-faq .stages {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .stage + .stage::before {
    left: -14px;
    top: 30px;
    width: 14px;
    height: 2px;
  }
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-groups {
  display: grid;
  gap: 30px;
}

.page-faq .qa-group {
  min-width: 0;
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 2px solid var(--cyan-500);
}

.page-faq .qa-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-500);
}

.page-faq .qa-group__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-faq .qa-group--biz .qa-group__head {
  border-bottom-color: var(--ember-500);
}

.page-faq .qa-group--biz .qa-group__num {
  color: var(--ember-300);
}

.page-faq .qa {
  background: var(--faq-panel);
  border-left: var(--faq-rule);
  border-right: var(--faq-rule);
  border-bottom: var(--faq-rule);
  transition: background 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .qa[open] {
  background: var(--ink-900);
  box-shadow: inset 3px 0 0 var(--cyan-500);
}

.page-faq .qa-group--biz .qa[open] {
  box-shadow: inset 3px 0 0 var(--ember-500);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-height: 44px;
  padding: 14px 16px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper-100);
  cursor: pointer;
  list-style: none;
  transition: color 180ms var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--cyan-500);
}

.page-faq .qa__q::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin: 6px 2px 0 auto;
  border-right: 2px solid var(--cyan-500);
  border-bottom: 2px solid var(--cyan-500);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease);
}

.page-faq .qa[open] > .qa__q::after {
  transform: rotate(135deg);
}

.page-faq .qa__a {
  margin: 0 16px 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-700);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist-300);
}

.page-faq .qa[open] > .qa__a {
  animation: faq-answer-in 200ms var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 900px) {
  .page-faq .qa-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 28px;
    align-items: start;
  }
}

/* ---------- 术语对照 ---------- */
.page-faq .terms-layout {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-faq .terms__figure {
  margin: 0;
  border: var(--faq-rule);
  background: var(--faq-panel);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .terms {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .terms th,
.page-faq .terms td {
  text-align: left;
  vertical-align: top;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-700);
}

.page-faq .terms thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--cyan-500);
  border-bottom: 2px solid var(--line-700);
}

.page-faq .terms tbody th {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--paper-100);
  white-space: nowrap;
}

.page-faq .terms tbody td {
  color: var(--mist-300);
}

.page-faq .terms tbody tr {
  transition: background 160ms var(--ease);
}

.page-faq .terms tbody tr:hover {
  background: rgba(47, 224, 208, 0.07);
}

.page-faq .terms tbody tr:hover a {
  color: var(--cyan-500);
}

.page-faq .terms a {
  color: var(--paper-100);
  text-decoration: underline;
  text-decoration-color: var(--line-700);
  text-underline-offset: 3px;
  transition: color 160ms var(--ease), text-decoration-color 160ms var(--ease);
}

.page-faq .terms a:hover {
  text-decoration-color: var(--cyan-500);
}

@media (min-width: 900px) {
  .page-faq .terms-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 28px;
    align-items: start;
  }
}

/* ---------- 常见误区 ---------- */
.page-faq .traps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .trap {
  padding: 18px 20px 20px;
  background: var(--faq-panel);
  border-left: 4px solid var(--ember-500);
}

.page-faq .trap__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ember-300);
}

.page-faq .trap__title {
  margin: 8px 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-faq .trap__fix {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist-300);
}

@media (min-width: 760px) {
  .page-faq .traps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }
}

/* ---------- 仍未解决 ---------- */
.page-faq .helpdesk {
  display: grid;
  gap: 20px;
}

.page-faq .helpdesk__panel {
  min-width: 0;
  padding: 22px;
  border: var(--faq-rule);
  background: var(--faq-panel);
}

.page-faq .helpdesk__panel--accent {
  border-color: var(--ember-500);
  box-shadow: var(--shadow-hard);
}

.page-faq .checklist {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-faq .checklist li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 8px;
}

.page-faq .checklist li::before {
  content: "▸";
  color: var(--cyan-500);
  line-height: 1.75;
}

.page-faq .channels {
  display: grid;
  gap: 0;
  margin: 14px 0 20px;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
}

.page-faq .channels .contact-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line-700);
}

.page-faq .channels .contact-item:last-child {
  border-bottom: none;
}

.page-faq .channels .contact-item__key {
  flex: 0 0 64px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan-500);
}

.page-faq .channels .contact-item:last-child .contact-item__key {
  color: var(--ember-300);
}

.page-faq .channels .contact-item__val {
  min-width: 0;
  color: var(--paper-100);
  line-height: 1.7;
  word-break: break-word;
}

@media (min-width: 900px) {
  .page-faq .helpdesk {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 24px;
    align-items: start;
  }
}

/* ---------- 降级与无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .stage,
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__q::after,
  .page-faq .terms tbody tr,
  .page-faq .intro__quick-link {
    transition-duration: 1ms;
  }

  .page-faq .stage:hover {
    transform: none;
  }

  .page-faq .qa[open] > .qa__a {
    animation: none;
  }
}